PERFECTION IN RULE OR A LICENSE TO INNOVATE? EARLY MODERN ARCHITECTS READ VITRUVIUS BOOK 3.1

For the historian of early modern Italian architecture, Vitruvius is unavoidable. In fifteenth- and sixteenth-century Italy, the study of Vitruvius, in conjunction with the surviving physical models of ancient buildings, was a project that united architects. With the difficult tract as their guide, architects teamed together, often with learned aides, to understand the principles of ancient design. Comparing Vitruvian dicta with antiquarian fragments, architects endeavored to recreate the forms, numbers, and proportional rules prescribed by the ancient author. And using pencil, charcoal, and ink, they created images, filling in the voids of the famously unillustrated text.

to Greek antiquity. 5According to this tradition, proportions-magnitudes with the same ratio-were all-pervading organizational principles of the universe.In the medieval period, the analogy between the universe, as a macrocosm of divine creation and the microcosm of man, was visualized in images of God the architect.In the age of humanism, which brought greater attention to the individual, systemization, and reason, proportions took on even greater importance. 6In this period, the Vitruvian analogy between the body and architecture upheld the idea that proportions should comply to conceptions of a higher order, and that the proportions of man, as the image of God, provided the basis for ideal forms and beauty. 7his paper examines early modern architects' study and illustration of Vitruvius' book 3.1, relating this process to coeval architectural practice, and, more specifically, to the perceived need for a clearly delineated system of rules and proportions.The spate of architectural treatises and commentaries produced in early modern Italy-and indeed, also editions of De architectura-may be directly related to the ad hoc role of the architect.In the fifteenth and sixteenth centuries, the architect followed no explicitly systematized course of training and pursued a practice that was much different from the codified, accredited profession we know today.It is not surprising, therefore, that the text of Vitruvius, which promised not only to elucidate the principles of 'superior' all'antica architecture, but also represented a prescriptive approach to the discipline, had an enormous appeal.The text, moreover, gained authority in its antiquity, and an allure in its esotericism.But these same qualities-the text's vagueness and imprecision, and its circulation in varied versions-also encouraged its revision.It is telling that one of the most authoritative editions of the text, that of Fra Giocondo, was composed with an eye more toward contemporary utility than philological accuracy.Explaining his methodology, Fra Giocondo emphasized his consultation of both books and ruins.His reading of this evidence was broad, and he readily admitted that he had reformed and corrected the text where he deemed it necessary. 8Taken up for the purpose of uncovering fixed rules, De architectura ultimately spurred innovation more than it delineated doctrine.For fifteenth-and sixteenth-century architects, Vitruvius' treatise paradoxically legitimized new theories and unprecedented combinations.Ample evidence of this is revealed in the early modern translations, commentaries, and illustrations of book 3.1.
EARLY MODERN ARCHITECTS READ VITRUVIUS measures and proportions.In copying a canonical building plan, entablature, or column capital, it was not enough for the architect to record the structure's forms.He was careful to include the monument's dimensions, frequently given according to local units of measure, along with notes regarding its name, location, and condition.One might interpret this practice as epitomizing the stereotypic notion of the architect's 'attention to detail'.But in fact, there are a great many architectural drawings from the early modern period-for example, the widely circulated drawings of building machinery-that contain no such annotations. 9ertainly, the realization of such technical constructions required attention to detail.But an explanation for the absence of measures in machine drawings may be ascertained in the theoretical nature of the drawings, and of the subjects they depict.For the early modern architect, the pumps, hoists, mills, and windlasses displayed in a volume like the Opusculum de architectura represented an interface between existing and envisioned constructions (fig.5.1). 10 These were devices that still needed to be specified and calibrated according to the contours of a particular environment.The antique column bases and entablatures meticulously recorded in a book like the Codex Mellon (c.1513), by contrast, were valued as standard prototypes, exempla taken from the field that could be directly applied in practice (fig.5.2).The measures documented on such folios connected the model to a specific monument and site, thereby endowing it with an authority that might be transferred in its re-appropriation.
For the early modern architect, the 'stupendous ruins' of Rome were tangible proof of the unsurpassable greatness of antiquity and offered legitimacy to a design practice that was wanting standard guidelines. 11Vitruvius' De architectura was deemed an essential authority for understanding the remnants of Rome and deciphering their measures.The antiquity of the text and erudition also securely situated its subject-the art of building-among the artes liberales.The theory of Leon Battista Alberti (1404-1472), whose De re aedificatoria became the modern equivalent of Vitruvius, bears the earliest evidence of this. 12De re aedificatoria, conceivably born out of an attempt to edit Vitruvius, harshly criticizes the 'unrefined' nature of the ancient text and asserts that it was virtually incomprehensible.On the ancient author, Alberti famously complained that 'for the Greeks he seemed to write in Latin, and for the Latins Greek, and for us he may as well not have written at all since we cannot understand him'. 13All the same, Alberti's dependence on the Vitruvian model is undeniable.As underscored by Krautheimer, among others, Alberti's tract bears debt to De 9.The consummate study on early modern machine drawings remains that of Lefèvre (2004).10.The Opusculum de architectura was first formulated in an autograph version by Francesco di Giorgio c. 1475.A comprehensive study of the Opusculum de architectura and its manual reproduction in the fifteenth and sixteenth centuries is forthcoming by the author.For a partial catalogue of Opusculum copies, see Scaglia (1992).

ELIZABETH MERRILL
architectura in its title and ten-book form, as well as in reliance on Vitruvian terminology, technical information, and historical facts. 14lberti was not alone in his reliance on the Vitruvian template in creating a new theory.Lorenzo Ghiberti incorporated passages from his own translation of De architectura in his Commentari. 15Around this same time, Antonio Averlino 'Filarete' (c.1400-1469) completed his Italian treatise on architecture, which opens with a scene of a mealtime discussion, in which the classical tradition and the authority of Vitruvius is openly debated. 16Although Filarete seldom cites Vitruvius directly in the ensuing text, he stays close to Vitruvian thought on a number of key issues, including the definition of the classical orders, proportional theory, and decorum.
Francesco di Giorgio Martini (1439-1501) was the first to most fully embrace De architectura for both the principles that it promised to elucidate and for the possibilities of innovation that its inscrutability would eventually allow.Introducing the second rendition of his Trattato di architettura, as conserved in the codex Magliabechiano II.I.141, Francesco explains his desire to study the architecture of the ancients, and to 'provide images with the text-giving new force to the words of ancient authors-most of all Vitruvius, the most acclaimed of all'. 17he guidance Andrea Palladio (1508-1580) took from Vitruvius several decades later was much the same.Although he diverged from Vitruvius on a number of matters, he still advised architects to 'apply themselves to reading Vitruvius' and was keen to note that his own buildings followed Vitruvian teaching in their most noteworthy parts. 18Sebastiano Serlio (1475-1554) was equally reverential to the ancient author.Appealing to good practitioners in his Extraordinario libro di architettura (1551), he affirms that such individuals are 'grounded in the doctrine of Vitruvius (which I praise to the highest and from which I do not intend to stray far)'. 19For these theorists, Vitruvius' De architectura-as the sole remaining architectural treatise from antiquity-was the key link in the chain that connected the disparate, tangible remains of ancient Rome to the creation of coherent theory for contemporary practice.
All the same, as editions of De architectura became ever more available in the sixteenth century, and the text became increasingly comprehensible to architects, the authority granted to Vitruvius was likewise qualified.Raphael (1483-1520), who commissioned a translation of De architectura from the humanist Fabio Calvo (1450-1527) so as 'to find the beautiful forms of ancient buildings', tellingly concluded that the book 'sheds light, but not enough'. 20I quattro primi libri di architettura (1554) of Pietro Cataneo (c.1505-1569) repeatedly cites the authority of Vitruvius, but also points out his errors and notes those instances when he 'gave poor advice'. 21Even Palladio and Serlio, who held De architectura as an essential guide, did not fail to identify his flaws.Palladio noted that the text was frequently misunderstood by architects due to 'a lack of investigation of the ancient monuments'.His own diligence in this regard, along with the illustrations he composed, were to 'provide demonstrations of what he [Vitruvius] teaches'. 22Serlio similarly warned of the 'great discrepancy' that was evident 'between the buildings in Rome … and the writings of Vitruvius'. 23This was true.Even had De architectura proved readily legible for early modern architects, its use as a pattern book for ancient architecture would have been problematic.For one, the fragmentary remains of antiquity that were accessible in the fifteenth and sixteenth centuries were just that-fragments.What is more, that which was visible was not necessarily constructed according to Vitruvian rules.Vitruvius wrote at the end of the first century B.C.E., before many of the ancient buildings known by early modernists were even constructed.Equally critical, just like the early modern writers he inspired, Vitruvius too wrote in response to a perceived dearth of commendable buildings and traditions. 24he comments of Jacopo Strada (1507-1588) on Serlio's theoretical contribution vis-à-vis the Vitruvian model speak more generally to architects' uncertain relationship with the ancient authority.The theory of Serlio, Strada pronounced, 'cuts a straight path to the abstruse secrets of architecture which until now have lain hidden in the books of Vitruvius, obscure and almost unintelligible'.What was more, according to Strada, Serlio had himself augmented knowledge of ancient building by means of his own on-site study, amassing models and measures that 'are not to be found either in Vitruvius or in other authors'. 25What follows is both an encomium to Serlio and a justification of his deviation from Vitruvian rule.Serlio, Strada asserted, 'did more with his books than even Vitruvius had done before him'. 26 ELIZABETH MERRILL from the early sixteenth century onward, immutable printed text-to provide the architect with clear rules and a prescribed job profile.
The Vitruvian Man?
And so, if Nature has composed the human body so that in its proportions the separate individual elements answer to the total form, then the ancients seem to have had reason to decide that bringing their creations to full completion likewise required a correspondence between the measure of individual elements and the appearance of the work as a whole.(Vitr.De arch.3.1.4) 27 In book 3.1 of De architectura Vitruvius employs the human body as an analogy for the principle of symmetria found in temple design.The rule of symmetry is shown to be closely related to 'proportion', or the use of the module and a scale-based system.Vitruvius tells us that just as the members of the human body correspond to one another, and to the body as a whole, so too should the parts of temples.Pure geometries, the circle and the square, are used to illustrate symmetry, and are related to the human form. 28ithin the context of book 3, the purpose of the human analogy is to justify Vitruvius' specifications for the design of temples.Although his model is the human body-a common and relatively consistent form of reference-he is not concerned with the body itself. 29In fact, within De architectura, the man is treated in the passive.He is merely the instrument of a demonstration, laid on his back, the compass placed at his navel, his fingers and toes encircled. 30he canonical early modern image of this passage-and, one might well argue, of Vitruvius as a whole-is that created by Leonardo da Vinci (1452-1519), which is accompanied by an Italian version of the Latin text (fig.5.3).The so-called Vitruvian Man-habitually employed in a wealth of contexts to demonstrate a host of stereotypical 'Renaissance' ideas-illustrates and extends the principles of Vitruvian symmetry and proportion.It has also come to epitomize Leonardo himself, his excellence in all artistic media, and his stature as the Renaissance man par excellence.But in fact, the image has little to do with architecture.It is more closely related to Leonardo's study of anatomy and human measures and critically, the proportions it records, in both the image and the text, diverge from those cited by Vitruvius.Although the drawing does offer a solution as to how the outstretched figure might be inscribed in both a circle and a square, as given in De architectura, the strongest EARLY MODERN ARCHITECTS READ VITRUVIUS associations it draws are to contemporary intellectual thought.Leonardo's figure is a celebration of the perfection of man in the form of God the Creator.The circle, centered on his navel, and the square, centered on his penis, speak to man's regenerative capacity, his position as both an agent and a result of procreation. 31More broadly, the drawing speaks to early modern fascination with proportions and the harmonies they exhibit.As underscored by Panofsky, 'The Italian Renaissance … looked upon the theory of proportions with unbounded reverence'. 32Vitruvius was one pillar upon which this devotion was based.
The proportional relationship of the parts-the ideal cited in De architectura 3.1-found resonance with the early modern concern with order, rule, and geometry.This was an era in which a preliminary education typically began with practical mathematics (abaco), in which double-entry bookkeeping was developed, and in which a mathematically exact theory of perspective was codified in print.In this period, cosmological and philosophical interpretations of the theory of proportions-derived from the writings of Plato and Cicero, Augustine and Thomas Aquinas-were fused with the classical notion of 'symmetry' as the fundamental principle of aesthetic perfection. 33For many architects the idea that correct architectural proportions were derived from the human body was tied to Christian thought, not Vitruvius.For Filarete, measurements stemmed from the body of Adam, who was considered the most beautiful creation of God: 'Therefore it is likely that they [the first designers] took from the form of Adam and from his head made the first measurement'. 34The theory of Francesco di Giorgio, which owes much to Vitruvius, likewise bears traces of Christian theology.Early renditions of Francesco's text specify that the measures and symmetries of architecture owe their origin not just to the human form, but to the bones of the body. 35The genesis of architecture in the literal body of man is further hinted at in the skeleton that appears in the codex Saluzziano 148 version of the Trattato di architettura, directly following Francesco's Vitruvian-guided exposition on the proportions and measures of the columnar orders (fig.5.4).Palladio likewise appears to be looking to another source when he compared the human body to a building in book 2 of his treatise on residential architecture and distribution of different spaces.He notes that just as certain parts of the body are less attractive than others, and are therefore naturally concealed, so 31.Lugli (2019), 69-80.32.Panofsky (1955), 88. 33.Panofsky (1955), 89; Lowic (1983), 362.34.The original text of Filarete reads: 'I primi inventori, come si sia, è da credere che guardassero alla più degna e alla più bella forma, fusse chi volesse, perché quella di Adamo, come è detto, per più ragioni era la più bella.Adunque da essa è verisimile la pigliassero e colla testa sua facessero la prima misura e dalla testa principiassero, come era degna cosa' (Finoli and Grassi [1972], 18); (partial) translation by the author.On this passage, see also Kanerva (2006), 173.
35.Codex Spencer, 129, New York Public Library, folio 7v-8r: 'capitelli e cornice et tutte altre misure et simitrie che habiano havuto origine da i membri & ossa del corpo humano.'As demonstrated by Kolb (1988), 154f., the Zichy codex, which is believed to be copied after an early version of the Trattato di architettura, also refers to the 'bones of the body' in the discussion of measures.
ELIZABETH MERRILL too in architecture the most beautiful places are those that should be the most visible. 36his is to say, for the early modern architect, Vitruvius' De architectura presented one point of reference on the theory of proportions, but there were numerous other texts in which the human body was employed in discussions of formal and theoretical order.It is imperative to situate the early modern reading of Vitruvius in its contemporary context: one of a consummately Christian worldview.Architects apprehended Vitruvius' comments on the human body in light of an existing framework of prevalent religious connotations. 37The idea of man as a microcosm, which can be traced back to Platonic philosophy, was deeply embedded in Christian thought.For the twelfth-century theologian Alain de Lille, God was not only the 'world's architect, … the skillful architect of a stupendous production', but also the human architect, as the creator of man. 38In the iconography, the superimposition of man within a circle, at times embraced by a larger God figure, literally shows man as a microcosm of the universe, with both man and the universe owing to God's design. 39Although images like those of Hildegard of Bingen (1098-1179) were not specifically architectural, they were architectonic, as illustrations of the art of system making (fig.5.5). 40For early modern practitioners who sought to make known their social importance, such images were consequential.
Within early modern literature, the idea of God-the-architect is often presented within texts that are clearly adapted from De architectura 3.1, albeit without reference to the Roman author. 41The Composizione del Mondo of the thirteenthcentury Italian monk Restoro d'Arezzo is particularly indicative: the body of the world, with its powers, which it has from the highest God, should all be proportioned according to reason … and the wise artists to whom nature gave and granted the power to devise and to draw the things of the world, when they draw the figure of man, divide the measurement in ten equal parts.And from the highest part they make the face and from there nine parts below are counted, and by the face they proportioned the hands, the feet, the chest and the whole body.The wellproportioned form and figure was seen and known by them.Certainly, there already existed a rich literary and iconographic tradition in which correspondence was drawn between formal and theoretical order, and, more specifically, between the human body, as a complete and perfect form, and the model construction or state.
While the humanist Poggio Bracciolini did not actually 'rediscover' Vitruvius in 1416-the text had never been lost-his identification of De architectura as a text dedicated specifically to architecture was of crucial importance.Early modern architects might well have adopted the Vitruvian proportional ideals without De architectura, but the knowledge of the elusive, ancient architectural text that presented these ideas made them all the more intriguing.The connection made between the human body and building in De architectura 3.1 not only affirmed the association between architectural practice and a higher order, it also allowed the architect to relate his own body to his ability to produce great buildings. 44The passive nature of the model man described by Vitruviusplaced on his back with outstretched arms-was thus made active.What was presented as an analogy in ancient theory was transformed by rule-seeking architects into a dynamic model that could be applied in practice.

Bending the Rules
Early modern architects approached Vitruvius as an authority, but freely selected from and interpreted his text.Nowhere is this more evident than in passages derived from book 3.1 of De architectura.Francesco di Giorgio's literal reading of the human analogy, employed to undergird other components of his design practice, is exemplary of this trend.In a notable elaboration on Vitruvian theory, Francesco opens the early version of his Trattato di architettura (codex Saluzziano 148): 'According to Vitruvius, all art and measure are to be derived from the well-composed and well-proportioned human body.' 45 In the 43.Rykwert (1996), 85f.44.Kemp (2006), 97; Lowic (1983), 363; compare Kathrin Winter's discussion, in this issue, of De architectura's appeal to the sensorimotor system.
ELIZABETH MERRILL discussions that follow, Francesco applied the idea of man as a proportional template, and the essential manner of the Vitruvian analogy, in his expositions on churches, fortifications, cities, and the columnar orders.The resulting theory (fig.5.7, 5.8) substantially elaborates upon De architectura. 46On religious architecture, Francesco writes: Since the basilica has the form and dimensions of the human body, and because the head is the main part of the body, so the great chapel [apse] is to be designed as the principal part and head of the temple.And given that it [the head] has five lines and divisions, it [the apse] must have five chapels.… Similarly, the quadrature of the wide chest is to be associated with the crossing; the arms [form] the cross; the palms of the hands [form] the opposite chapels; the fingers [form] the five semicircles that go around them [the palms].The rest of the six parts are to be given to the body of the church.… And given that the chest measures the width of two heads, the same square formation is to be followed both in the body and the crossing. 47is exposition, which essentially claims that the basilica should mirror the form and composition of the human figure, in fact owes little to Vitruvius.It is possible that Francesco was influenced, directly or indirectly, by contemporary commentaries, such as Giannozzo Manetti's 1436 Oratio of the consecration ceremony of Santa Maria del Fiore in Florence, in which the basilica plan church was compared to the human body. 48Although Francesco's citation to the human figure bestows a mantle of authority, the model is vague.More so than providing the basis for a new mode of practice, the text and illustrations proposed by Francesco justify an established mode of planning. 49This is again evident in Francesco's discourse on city planning, where he adapts Vitruvius to say something that is quite basic: that the city plan may be circular or square, or some variation thereof, but should be well proportioned.
48. Eck (1998), 462f., quoting and translating the Oratio de secularibus et pontificalibus pompis in consecratione basilicae Florentinae, book II, 50-6, based on ms.Vat.Lat.6303.There is no evidence that Francesco di Giorgio knew Manetti's Oratio.However, as noted by Eck, the analogy between the human body and the form of the church was commonplace by the fifteenth century.

EARLY MODERN ARCHITECTS READ VITRUVIUS
As cities have the measure, dimensions, and form of the human body, I will now precisely describe the circumference and location of their parts.To begin, it is important to know that, if the human body is laid out on the ground and a thread is placed at the navel, a circular form will be drawn around its extremities.Similarly, a square form can be drawn.Therefore, considering that the body has all parts and members with perfect measure and proportions, the same [model] should be observed in cities and in other buildings. 50ether Francesco misunderstood the ancient author, or knowingly misconstrued the text, is uncertain. 51Whereas Vitruvius used the human body as a formal example of symmetry and proportion, Francesco argued that the human body-because of its symmetry and proportion-itself provided a formal model in the design of architecture.Unquestionable, however, is the didactic efficacy of Francesco's illustrative theory, and his literal mapping of the human body on architecture.Not only were the ideograms he provided widely copied, but the methodology he expounded, which cited Vitruvius but ultimately said something else, was echoed by subsequent authors.Pietro Cataneo, who, as previously noted, was critical of Vitruvius, followed Francesco in his discussion of cities: 'Now, departing for the many errors which have been shown …, and not following all the rules of Vitruvius, we … with the help of Jesus Christ might engineer to give those specific features to the parts of our city, as one [likewise] wishes in a beautiful and well-proportioned human body'. 52he idea that all design should derive from 'a well-proportioned human body' became a common dictate, repeated by early modern architects and theorists.The edition of De architectura of Giovanni Antonio Rusconi (1520-1587), which is essentially a commentary on Vitruvius, in fact introduces the latter's book 3 in these terms: 'The First Chapter of the Third Book contains the rule of measures, taken from the human body, all the members of which have correspondence with one another.' 53Only after reviewing the ideal proportions of man does the author 50.Martini (1967), 1:20: 'Avendo le città ragion, misura e forma del corpo umano, ora delle circunferenzie e partizioni loro precisamente descriverò.In prima è da sapere steso in terra el corpo umano, posto un filo a l'imbellico, alle stremità d'esso tirata circulare forma sirà.Similmente quadrata ed angolata disegnazione sirà.Adunque è da considerare, come el corpo ha tutte le partizioni e membri con perfetta misura e conferenzie, el medesimo in nelle città e altri [e]difizi osservar si debba.';translation by the author.
ELIZABETH MERRILL make the transition to architecture, citing Vitruvius in this progression of thought.The fact that Rusconi did not fully agree with Vitruvius, or with his contemporary commentators, on the ideal proportions of man was no great matter.The written theories prove that in regard to the columnar orders, multiple, slightly different systems were used.In architecture, it seems that every practitioner (or theorist) developed a 'correct' system of proportions according to his own understanding, and more critically, in accordance with his own practice. 54In short, the desire for rules and a codified design system, which is directly traced in the abundance of architectural theory produced in this period, did not equate to definitive, rigid systems. 55For the early modern architect, the ability to be flexible, to adapt and modify as the situation demanded, remained integral to his practice.
The idea that rules could, and should, be adjustable is in fact fundamental to De architectura, and one might argue that the conditionality of Vitruvius' dicta was internalized by early modern architects.Although Vitruvius relays his intention to lay down 'all the principles of the art' (omnes disciplinae rationes, De arch.1.praef.1), he is ultimately very summary and lenient in his rules. 56The language of book 3.1, as the treatise as a whole, is far from dogmatic.Vitruvius opens with what the architects 'ought' to do (tenere debent), and on several occasions qualifies his rules with quemadmodum ('to whatever extent').Elsewhere in the treatise, Vitruvius is even explicit that rules and symmetries should not always be observed, because site conditions and architectural necessities often require the architect to add and subtract measures according to his own judgement. 57n accordance, the overwhelming ethos among early modern architects still prized the individual's invenzione and giudizio ('invention' and 'judgement') above all else. 58This is evident in Alberti's commentary on beauty in De re aedificatoria, which derives from Vitruvian statements of proportion.According to Alberti, beauty is that which displays a 'reasoned harmony of all the parts within a body, so that nothing may be added, taken away, or altered, but for worse'.He follows to say how difficult it is, even for Nature, to achieve perfect beauty, requiring 'all our resources of skill and ingenuity'. 59Although he does not say that beauty is subjective, he submits that it is not easily defined.The creation of beauty is itself a skill, an art, achieved through practice, observation, experiment, and knowledge.58.Antonio da Sangallo the Younger, for example, commented that 'Vitruvio è goffo'-'Vitruvius is clumsy'-on UA 981 (Gabinetto dei Disegni e delle Stampe degli Uffizi), a page of studies that examines antiquarian remains according to Vitruvius.Peruzzi was also said to be critical of Vitruvius.See Cellauro (2004), 303, from where this citation is taken.

EARLY MODERN ARCHITECTS READ VITRUVIUS
The idea that the architect should follow Vitruvian rules, but take license to deviate according to his own talent and judgement, became a conciliatory stance adopted by architects.Daniele Barbaro (1514-1570), for example, considered the relative freedom of the ancient architect, as described by Vitruvius, to be an essential condition of his excellence. 60He allowed that 'it is the power of the careful and cautious architect to make up many other forms with the principles of measure'. 61he advice of Serlio follows a similar thinking.'We should uphold the doctrines of Vitruvius as an infallible guide and rule', he wrote, before adding, 'provided that reason does not persuade us to do otherwise'. 62Theoretical appeals to the architect's reason, which was closely connected to his capacities of judgement and invention, thus came to support a great range of interpretations of the ancient text.

Illustrating the Ideal
In early modern Italy, the open, individual reading of De architectura became integral to the text itself.The insertion of illustrations was a key component of this, traceable in both manuscript and printed copies, as well as early modern treatises and commentaries on the text.The loss of the eleven images originally included by Vitruvius in the treatise presented a major stumbling block for architects who were determined to understand ancient architecture. 63But the absence of images also pointed to drawing-disegno-the intellectual process by which ideas were translated into legible designs.It was through drawing, above all else, that architects grappled with De architectura, comparing the text with the antiquities they surveyed, and drafting out alternative solutions.What was seen as one of the biggest flaws of De architectura as it came down to the early modern period-the lack of images-thus became a catalyst for the generation of new ideas, forms, and theories.
The early Sulpizio printed edition of 1486 included no images, but it was not that the editor saw that images were unnecessary.Rather, Sulpizio encouraged the reader to use the wide margins of the printed book to insert his own notes and visual reconstructions. 64Annotation was part and parcel of the reading process.Francesco di Giorgio drafted his translation of Vitruvius on folios with wide margins that offered ample space for the insertion of manicules and illustrations. 65The far rougher, working translation of Fabio Calvo (1450-60.Cellauro (2004), 328.61.Long (1979), 158f.62. Serlio (1540), 69v; Hart and Hicks (1998b), 147f.63.Serlio (1537) lamented the loss of the figures, which he said made Vitruvius' text particularly difficult to understand (as quoted by Hart [1998], 170).
64. Ciaponni (1984), 73; Rowland (2003), 1. 65.Given the considerable margins, it is possible that Francesco intended to add more illustration.For a transcription of the translation, with notes and reproductions of several folios, see Martini  (2002).
ELIZABETH MERRILL 1527) contains more annotations, rendered by Calvo himself and Raphael, along with notes as to where illustrations were to be added. 66There are also manuscript copies of the text, which, although lacking illustrations, include blank spaces where images were to be added. 67Printed versions of De architectura-both with and without illustrations-were likewise liberally emended by architects.Prominent examples included a copy of Fra Giocondo's 1513 edition, which was owned and annotated by Antonio da Sangallo the Younger (1484-1546); the so-called Corsini Incunabulum, with notes and illustrations by Giovanni Battista da Sangallo (1496-1548); and a copy of the Latin edition of Guillaume Philander (1552), with copious annotations by Giorgio Agricola (1494-1555). 68he degree to which architects saw images as essential to understanding De architectura is fully evident in the number of printed versions of the text that contained illustrations.In regard to book 3.1, the figures were often similar, but never identical.Fifteenth-and early-sixteenth-century copies and commentaries of De architectura routinely feature the so-called 'Vitruvian man'.Most commonly, this figure was circumscribed in a circle or square-or both (fig.5.3, 5.8, 5.9).But few, if any, of these images are purely illustrations of Vitruvius.Like Leonardo's iconic drawing, those of Francesco di Giorgio (fig.5.8) and Fra Giocondo (fig.5.9) suggest a liberal reading of the text.They present the Vitruvian idea of the model figure inscribed in a circle and a square, but their adherence to De architectura extends little beyond this.The illustration of Fra Giocondo is essentially an illustration of Vitruvius' method, or geometrical idea.The symmetry of the body, and the proportions and measures of the human figure, are not detailed.
Other architects' illustrations of book 3.1 speak to the importance of proportions within an artistic curriculum, something that was officially realized with the creation of the first art academies in the late-sixteenth century.The illustrations of Giovanni Antonio Rusconi and Giovanni Battista da Sangallo use the Vitruvian model to chart the ideal man, considering in detail the symmetry and proportions of the human form (fig. 5.10, 5.11).Taken out of context, these figures might be deemed to show how the focus on the body detracted from actual architecture.But in fact, they speak to the close relationship that existed in this period between the arts.The study of anatomy was just as appropriate for the painter as it was for the architect interested in the 'human analogy'.What is more, by underscoring the connections between architecture and other scientific pursuits, individuals like Giovanni Antonio Rusconi and Giovanni 66. Fontana and Morachiello (1975); Pollali (2012), 177-9.67.A significant example is the codex Ott.Lat.1653, which dates to c. 1500.See Scaglia (1985)

EARLY MODERN ARCHITECTS READ VITRUVIUS
Battista da Sangallo bolstered the theoretical apparatus of their discipline.Far from mere handcraft and labor, architecture was a profession of the artes liberales.
There are also early modern illustrations of book 3.1 that do not feature the human form.For example, Daniele Barbaro omitted an image of the proportional man in his Italian edition of Vitruvius, citing its frequent production by others. 69nstead, he provided a table of ideal numbers, and generously illustrated sample temple plans and façades. 70t was in the practical application of the Vitruvian rule that early modern architects took the most liberties.As previously discussed, Francesco di Giorgio reinterpreted Vitruvius using the revised design concept to buttress his plans for centralized palaces, radial cities, and pedimented church façades.Francesco's image of the man inscribed within a temple plan is in direct dialogue with De architectura but is not actually an illustration of Vitruvius (fig.5.7).The illustrations Cesariano executed for his edition might be classified similarly.It is enough to cite his decidedly unclassical illustration of Vitruvius' ichnographia, ortographia, and scaenographia using the Duomo of Milan, with all of its distinctly Gothic details. 71 The illustrations of Giovanni Battista da Sangallo in the Corsini Incunabulum are analogous in the sense that they reflect an early modern vision of antiquity.In book 5, for example, the architect employs a contemporary study of the Colosseum-a cutaway view that was reproduced in variation in numerous early modern model books-to illustrate Vitruvius' discussion of theaters and amphitheaters. 72Without question, the Colosseum was a powerful emblem of ancient Rome and its monumental architecture; but the structure itself was erected after Vitruvius wrote De architectura.
A small group of drawings attributed to Bastiano da Sangallo (1481-1551) for a never-completed edition of De architectura are comparable in how they adapt the ancient theory, using it as a means to uphold an early modern vision of classicism.One of the eight folios, conserved today at The Metropolitan Museum of Art in New York, reveals how the architect drew on his personal knowledge of antique and contemporary architecture, and his imagination, to illustrate Vitruvius book 3.2 (fig.5.12a-b). 73Here, as with the other folios of the set, Bastiano was faithful to the Latin original in his translation.But in visualizing the different temple types he only generally followed the model prescribed by Vitruvius.On the folio's recto side, he presented in plan the temple in antis, alongside a ELIZABETH MERRILL perspectival elevation of the prostyle temple.For the latter, he omitted the corner columns specified by Vitruvius.The structure's façade is fashioned in a decidedly Renaissance manner, with a double pediment, a layered Doric order, extended pedestals, and heavy, square-corner pilasters.On the verso, the plan of the peripteral temple appears as an exemplar of perfect proportions.The potential embodied in the plan's pure geometries is reflected in the fantastical environment Bastiano stages around it.Two amazed onlookers examine the temple's contours, precisely sketched in the soil, almost as if divinely sanctioned.One carries a measuring rod, and leads an elder, bearded sage, who sits atop a steed.The trees sway in the background and, in a distant harbor, the ship of fortune enters the port.In effect, Bastiano has not only given form to Vitruvius' esoteric categorization of temples but has also brought them to life in a fictive narrative, open to interpretation.

An Authority for All
Examples of the appropriation and re-interpretation of De architectura in the early modern period are nearly endless.Artists and architects, as well as political theorists, humanists, and historians, granted the ancient author immense authority. 74Vitruvian theory was rich and broad enough to allow for a wealth of interpretations and applications.In the fifteenth and sixteenth centuries, each generation of readers came to the text with a new set of questions.Where some looked to Vitruvius for insight on the ancient theater, others consulted his text for information on machinery, the form of the Roman domus, or the measures of the columnar orders. 75 final example of the appropriation and conspicuous adaptation of Vitruvian theory speaks to the degree to which the ancient text infiltrated early modern culture.In the first decade of the sixteenth century, De architectura-and more specifically, the discourse on ideal proportions-was utilized by typographers who looked to formulate a classically inspired typeface (fig.5.13, 5.14).The revival of ancient letterforms was complementary to that of architecture.Lapidary inscriptions were frequently important features of buildings, monuments, and portals, and the early modern antiquarians and architects who endeavored to document the remnants of ancient building were often those who were charged with recording inscriptions. 76The mathematician Luca Pacioli (c.1447-1517) included extensive instructions for a Roman typeface in his treatise De divina proportione (1509) in terms that closely echo Vitruvius' book 3.1.In laying out the font's parameters, Pacioli instructs his reader to first describe a circle with a compass and then mark the diagonals with a straight edge and compass to define a square.The square is divided into nine parts, and sections of the letter derive from a ninth of the square. 77he project for De divina proportione is not only another example of the early modern applications of De architectura; it also speaks to the degree to which the study of the ancient text was approached as a 'team sport' that engaged individuals with a broad range of expertise and enthusiasm. 78In composing his theory, Pacioli relied heavily on Alberti.Settled in Milan at the court of Ludovico Sforza, he participated in a prolonged dialogue on Vitruvian theory that engaged Fra Giocondo, Bramante, Leonardo, and Cesariano.It was Leonardo who produced the illustrations for Pacioli's book. 79s a literary genre, the treatise was an emblematic preoccupation of early modern humanists, and De architectura was among the most prominent models. 80The spirit of Vitruvius-beyond the specific content of De architectura-may be considered a defining attribute of early modern culture and thought.It has been said, and with good reason, that Vitruvius was more a creation of the fifteenth and sixteenth centuries than he was of his own time. 81ent University elizabeth.merrill@ugent.beEARLY MODERN ARCHITECTS READ VITRUVIUS    ELIZABETH MERRILL 27.As translated at Rowland, Howe, and Dewar (1999), 47. 28.Scholfield (1958), 16-32.29.Pollali (2011), 70f.30.McEwen (2003), 157.

Despite all expectations, De architectura was alone insufficient to help delineate the professional contours of the early modern archi- tect. It would fall to new theories-which benefitted from ample illustrations and,
Running parallel to such explicitly theological treatments of the well-proportioned figure, we find specifically architectural drawings that use human forms as a mnemonic device for the geometric building frameworks.The wellknown figures of Villard d'Honnecourt (1200-1250) are exemplary of the latter.Although Villard makes no reference to Vitruvius, De architectura was known and copied in this period, particularly book 3.1 on the proportions of the human body.It is likewise uncertain whether Jacopo Mariano Taccola (1382-1453) composed his Vitruvian image (fig.5.6) using a copy of De architectura, or if he appropriated the Vitruvian content from an intermediary source.
In reference here to Vitr.De arch.6.2.Daniele Barbaro was one of the first to emphasize the importance of judgement in the application of Vitruvian theory; see Cellauro (2004), 304.
, 59f.68.The Fra Giocondo and Philander editions are both held at the Metropolitan Museum of Art in New York, Accession Numbers 41.100.556 and 41.100.503,respectively.The Corsini Incunabulum (ms.50.F.1,Biblioteca dell'Accademia Nazionale dei Lincei e Corsiniana, Rome) has been published in a facsimile version, Rowland (2003).