The inaugural lecture, or oration, delivered by Regiomontanus at the University of Padua in 1464 is deemed a document of remarkable significance in the history of science. Although it has attracted much scholarly attention, few efforts have been directed towards identifying the traces of Byzantine influence it might carry; that is to say, the extent to which Regiomontanus might have been influenced by the views of his patron, Bessarion. This paper responds to the need for such a study, arriving at the following conclusions. First, Regiomontanus's praise of astrology is in line with Bessarion's reaction to the official decisions taken against astrology in Constantinople at the Council of 1351 – decisions which were ultimately rooted in the hesychast controversy and in the confessional struggles between the Churches of Constantinople and Rome. Second, the legitimation of the Graeco-Arabic roots of astronomy in an institutional context, as undertaken by Regiomontanus, is in accordance with the intellectual influences Bessarion had absorbed in his youth in Constantinople. Third, contrary to some claims, it is likely that Regiomontanus does not adhere to a humanist anti-Arab agenda; rather, his views on the history of mathematics are a consequence of the Graeco-Arabic heritage of his patron, and of his lack of access to Arabic translations.

During the transition from the early to the modern era, the marginalization of astrology from the learned world marked a significant shift. The causes of this phenomenon are complex and still partially obscure. For instance, some sociological interpretations have linked it to a broader shift in mentality among the gentry and bourgeoisie, while other scholars attributed the decline to the emergence of the ‘new science’. Focusing on the case of Jean-Baptiste Morin (1583–1656), this paper examines the changing dynamics of patronage for what has been termed ‘the last official astrologer’. It demonstrates that Morin's appointment as professor of mathematics at the Collège royal and his prominence within the French court were expressions of a cultural politics in which his patrons were deeply invested. Conversely, Morin's efforts to restore astrology lent validation to the belief systems of his patrons. The paper further analyses Morin's fall from grace during his polemics with Gassendi and his circle, highlighting the political context of the Fronde and a growing public weariness regarding the relationship between politics and astrology. Ultimately, this case study reveals that in the French context, the marginalization of astrology was not solely determined within the ‘learned jurisdiction’. Instead, the shifting cultural and political investments of the ruling classes played a significant role.

Arguing about the stars has rarely been more controversial and dangerous than in the early modern period in Europe, especially in Catholic countries, in a time when old and novel conceptions of the heavens, planetary models and theories of celestial motions and influences were intensely debated, revised and scrutinized for philosophical soundness and religious conformity.1 In the hundred years or so that witnessed the birth and censorship of the Copernican theory; the execution in Rome of the most passionate defender of post-Copernican cosmology, Giordano Bruno (1548–1600), and the rise and fall of Galileo Galilei's (1564–1642) fame linked to his novel interpretation of the book of nature, the Catholic Church created some of the most powerful instruments of cultural control and educational conformity ever seen: the Inquisition, the Index of Forbidden Books and the vast network of Jesuit schools that spread from Rome and the Iberian peninsula across the globe.2

The concept of ‘science’ occupies a distinctive place within our rhetorical inheritance. Tangential to science's actual practices and institutions, this rhetoric holds that science comprises an arsenal of techniques, or a pervasive mentality, that have broadly shaped and even defined modern society. Such notions have been the subject of more or less constant discussion for two or three centuries, with early critics of scientific thought targeting its links to the religious and political radicalism of the Enlightenment and the troubles of industrialization.

Selenography was both a practice and a tool which developed through optical instrumentation in the seventeenth century. As a practice, it was the process of creating composite graphical depictions of the Moon through skill and sustained telescopic study. As a paper-based tool, the focus of this article, a selenography was a stabilized visualization and codified template for making, organizing and communicating lunar-based astronomical observations. The template's key observation and notation device was its system of named Moon spots, or lunar nomenclatures. Such systems varied significantly in different sites of knowledge making. Through the close study of two naming schemes produced and exchanged in Counter-Reformation contexts by Michael van Langren (1645) and Giovanni Battista Riccioli in collaboration with Maria Francesco Grimaldi (1651), this essay argues that selenographies were conceived with an eye to ideals of universal standardization for collective and even global observation. In practice, however, different forms of universality, revealing distinct local agendas tied to political and religious priorities, were materialized in each competing scheme.