Archaeoastronomical studies carried out during the last decades in Mesoamerica have demonstrated that civic and ceremonial buildings were largely oriented on astronomical grounds, mostly to sunrises and sunsets on certain dates, allowing the use of observational calendars that facilitated the scheduling of agricultural and related ritual activities. One of the deeply rooted but unfounded ideas is that many alignments recorded the Sun's positions at the equinoxes. By examining such proposals and analyzing their methodological flaws, I argue that they are not based on reliable and objectively selected alignment data, but rather derive from the preconceived significance attributed to the equinoxes. The most likely targets of the near-equinoctial orientations were the so-called quarter days, which occur two days after/before the spring/fall equinox and mark mid-points in time between the solstices. Considering that the astronomical alignments dominate extensive parts of the built environment, they must have played an important role in religion, worldview, and political ideology. Therefore, only a correct identification of their celestial referents, a prerequisite for any convincing interpretation of their meaning, underlying intents, and observational practices employed, can contribute to a proper understanding of some prominent aspects of architectural and urban planning in Mesoamerica.

Common salt, or sodium chloride, has always been a strategic resource of primary importance throughout the world. In pre-Hispanic Mesoamerica, salt was used primarily for human consumption, as the native diet had little chloride or sodium, two chemical components that are indispensable for human health and nutrition. Here I discuss the traditional salt industries of Michoacán, Colima, Guerrero, the Basin of Mexico and Puebla, paying special attention to the production sites and the tool assemblages linked to salt production in these areas of Mesoamerica. This article sheds light on salt's role in the culture and history of the ancient Mesoamerican ecumene through the lens of ethnoarchaeology and ethnohistory.

LiDAR coverage of a large contiguous area within the Mirador-Calakmul Karst Basin (MCKB) of northern Guatemala has identified a concentration of Preclassic Maya sites (ca. 1000 b.c.–a.d. 150) connected by causeways, forming a web of implied social, political, and economic interactions. This article is an introduction to one of the largest, contiguous, regional LiDAR studies published to date in the Maya Lowlands. More than 775 ancient Maya settlements are identified within the MCKB, and 189 more in the surrounding karstic ridge, which we condensed into 417 ancient cities, towns, and villages of at least six preliminary tiers based on surface area, volumetrics, and architectural configurations. Many tiered sites date to the Middle and Late Preclassic periods, as determined by archaeological testing, and volumetrics of contemporaneously constructed and/or occupied architecture with similar morphological characteristics. Monumental architecture, consistent architectural formats, specific site boundaries, water management/collection facilities, and 177 km of elevated Preclassic causeways suggest labor investments that defy organizational capabilities of lesser polities and potentially portray the strategies of governance in the Preclassic period. Settlement distributions, architectural continuities, chronological contemporaneity, and volumetric considerations of sites provide evidence for early centralized administrative and socio-economic strategies within a defined geographical region.

Systematic flotation survey and spatial analysis of artifacts at the submerged salt work of Ek Way Nal reveal evidence of a residence, salt kitchens, and additional activities. Ek Way Nal is one of 110 salt works associated with a Late to Terminal Classic (A.D. 600–900) salt industry known as the Paynes Creek Salt Works. Wooden posts that form the walls of 10 buildings are remarkably preserved in a peat bog below the sea floor providing an opportunity to examine surface artifacts in relation to buildings. Numerous salt kitchens have been located at the Paynes Creek Salt Works by evidence of abundant briquetage—pottery associated with boiling brine over fires to make salt. As one of the largest salt works with 10 buildings, there is an opportunity to examine variability in building use. Systematic flotation survey over the site and flagging and mapping individual artifacts and posts provide evidence that the Ek Way Nal salt makers had a residence near the salt kitchens, along with evidence of salting fish for subsistence or surplus household production. The results are compared with ethnographic evidence from Sacapulas and other salt works.

Durante la época prehispánica, la obsidiana se caracterizó por ser una materia prima de primera necesidad para la elaboración de gran variedad de objetos. La tecnología de talla para la extracción de diversos artefactos fue una importante actividad económica. En el occidente de México, la obsidiana resultó un recurso fundamental debido a su abundancia y a la diversidad de yacimientos presentes. Sin embargo, no todos los vidrios volcánicos disponibles tienen las características idóneas para la talla especializada. En la región Valles, dentro de las cuencas centrales del estado de Jalisco, se encuentran dispersos nódulos de obsidiana, con un alto grado de inclusiones, que ha sido referida meramente como “obsidiana de baja calidad”. Hasta ahora, en pocas ocasiones se le ha dado la importancia debida en cuanto al estudio de su composición geoquímica, a pesar de que este sirva para contrastarlo con aquellas que sí fueron empleadas como materia prima. El siguiente trabajo busca establecer las características de la obsidiana disponible en el sitio Atitlán, ubicado en la antigua Cuenca de Magdalena, para compararla con los desechos de un espacio en el que son evidentes talleres especializados de talla intensiva para la extracción de láminas que sirvieron para elaborar piezas útiles. Entre los objetivos primordiales del artículo, es comparar sus particularidades con las de la obsidiana empleada en el proceso productivo proveniente del sitio La Joya. Gracias a esta investigación, demostramos que la obsidiana disponible en la isla no fue aprovechada debido al tamaño de los nódulos disponibles y al alto grado de porosidad e inclusiones.

During an archaeological survey in the municipality of San Pedro Mártir Quiechapa, Oaxaca, Mexico, archaeologists from the Proyecto Arqueológico de Quiechapa (PAQuie) encountered and documented a number of carved stone elements. Of particular interest are the 30 representations of ballcourts carved into natural rock outcrops at two sites in the region. This is the highest density in which this type of ballcourt representation occurs throughout Mesoamerica. After their initial discovery, members of PAQuie documented the carved stone ballcourts using structure-from-motion (SfM) photogrammetry, a quick and affordable technique to collect 3D spatial, quantitative, and visual data of stone carvings.

In this article, I report on the carved stone ballcourt representations documented in the Quiechapa region and offer some preliminary interpretations. I first provide some description of the broader archaeological context in which the carvings were found. Then I describe the methods used to record the stone carvings, followed by a presentation of the data. Finally, in dialogue with extant literature, I explore some possibilities as to why these carved stone ballcourt representations were created, how they may have been used, and what they may symbolize.

At La Venta, Mexico, the Middle Formative Olmec regional center, the existence of individual leaders is interpreted from the evidence of monumental stone portraiture and several tombs believed to house the bodies of a sequence of kings late in La Venta's history. The status of these latter features as graves, however, has been debated since soon after they were excavated in the 1940s, especially because they generally lacked osteological material. What remained was arrangements of costume items as if adorning a body, usually associated with a stone container. Most archaeologists have advanced the reasonable explanation that bones and teeth would not have survived in tropical environments and accepted both the tomb attribution and their function as individual funerary monuments. A detailed review of available information from the La Venta excavations reveals these assumptions are not warranted. Field data indicate the absence of expected taphonomic evidence of bodily decay. Analysis of the stratigraphy of Mound A-2, aided, by computer-enhanced imaging of field drawings, demonstrates its tomb-like features were erected in a single, short construction phase, not over a span of decades as individual kings died. These conclusions call for alternative explanations of these “surrogate burials,” absent bodies materially evoked by ritual officiants.

High-magnification use-wear analyses create datasets that enable microeconomic studies of lithic consumption and household activities that complement macroeconomic studies of lithic production and exchange to collectively improve our reconstructions of ancient economies. In recent decades, compositional and technological analyses have revealed how certain obsidian sources and lithic technologies were exploited, produced, and exchanged in Mexico's central highlands region during the Formative period (1500 b.c.–a.d. 100). This article presents use-wear analyses of 275 lithic artifacts from four sites in northern Tlaxcala—Amomoloc (900–650 b.c.), Tetel (750–500 b.c.), Las Mesitas (600–500 b.c.), and La Laguna (600–400 b.c. and 100 b.c.–a.d. 150)—to compare household activities with lithic technologies and evaluate their roles in regional economies. Blades were used for subsistence and domestic crafting; maguey fiber extraction for textile production increased over time, especially in non-elite households. The preparation and consumption of meat acquired by hunting and other methods increased slightly over time, and bipolar tools were used as kitchen utensils. Bloodletting was practiced with two variations of late-series pressure blades, but these and other tools were neither exchanged as nor used to craft prestige goods, often viewed as driving forces of Formative economies in Mesoamerica.

This article presents the ceramic sequence and chronology resulting from a multi-year program of survey, excavation, and analysis of pre-Hispanic settlement and exploitation within the Zinapécuaro-Ucareo (“U-Z”), Michoacan obsidian source area. Pottery analysis and classification aided by seriation analysis identified nine ceramic complexes and seven ceramic phases and sub-phases that both expand and refine the ceramic sequence previously established for the region by Gorenstein's (1985) investigations at nearby Acámbaro, Guanajuato. Initially established by ceramic cross-dating, the U-Z ceramic chronology has been largely confirmed by 30 radiocarbon dates and spans over 2,000 years of pre-Hispanic settlement, which included at least two notable episodes of trait-unit and site-unit intrusion from the eastern El Bajío and central Mexico. One of these episodes involved the appearance of two enclaves settled by individuals from the Acambay valley c. 90 km to the East, most likely from the site of Huamango, which our data indicate would have been occupied during the Middle Postclassic period.

The Late Preclassic (400 b.c.–a.d. 200) site of Noh K'uh in Chiapas, Mexico, is home to extended residential groups that aggregated around a small ceremonial complex at the bottom of the Mensäbäk Basin. Evidence collected from domestic contexts indicates that the Late Preclassic households of this site were organized under corporate political systems that emphasized collective identity and cosmological renewal. This article reveals how the people of Noh K'uh integrated cosmological beliefs and practices within the construction of their dwelling spaces, particularly through using cache deposits and participating in other architectural renewal ceremonies. Residents of Noh K'uh may have engaged in these practices to create “semipublic” gathering spaces for administrative and ceremonial activities at the level of the household.

Angamuco and Chunchucmil are two of the few Mesoamerican cities with relatively complete street maps. These maps provide a rare opportunity to study how the bulk of the population moved through cities, how people worked together to organize a network of paths and open spaces, what kind of interactions these features afforded, and how they contributed to the formation of social identities. Having found that space syntax methods confirmed intuitive understandings without generating new findings, we apply a segment (paths) and node (intersections) analysis to both sites. With these analyses we recorded and characterized segment variables such as width, length, form, and curvature, and node variables such as size, form, and number of linked segments. Many of the nodes at both sites are open spaces, allowing us to register details about the configuration of shared public spaces that are less formal than monumental plazas. The analyses revealed neighborhood differentiation, local-level coordination of labor, and intentional efforts to create markets or spaces of assembly that may have complemented collective governance proposed for both sites. While Angamuco and Chunchucmil differ in terms of the general pattern of their pedestrian networks, they share similarities in terms of density of paths and types of intersections.

This article explores the symbolism of the petate in light of an unprecedented archaeological discovery. Excavations carried out in a Classic context in northern Michoacán revealed the impression of a petate marking the location of a burial. In addition, the lower section of the burial pit was covered over with andesite slabs, including one with grid-like and spiral incisions. After a brief overview of the ancient and modern uses of the petate and relevant archaeological evidence, I present the data that allow the testing of different hypotheses, in particular the symbolization of power through the petate. Contextual analysis suggests that both the woven mat and the incised slab served as thresholds, if not barriers, between the world of the living and the underworld. I propose that the petate was placed over the grave to serve as a regulator, ensuring that entities were properly separated and that they remained in their respective places. As such, it was an object protecting the cosmic order. I further suggest that the petate may have acted as a temporal gate, guaranteeing the continuous exercise of authority and argue that it was, as a finished object, endowed with power.

Arguably the most enigmatic of the Maya calendar cycles, the 819-day count has challenged modern scholars for decades. Even today it is not completely explained and there are several areas for further research, including its relationship with the synodic periods of the planets visible to the naked eye. Earlier research has demonstrated a four-part, color-directional scheme for the 819-day count such that each of the calendar stations progress in increments of 819 days in cycles of 4 × 819 days. Although prior research has sought to show planetary connections for the 819-day count, its four-part, color-directional scheme is too short to fit well with the synodic periods of the visible planets. By increasing the calendar length to 20 periods of 819-days a pattern emerges in which the synodic periods of all the visible planets commensurate with station points in the larger 819-day calendar.

The system of communication in use in central Mexico at the time of the Spanish Conquest was made up of signs composed largely of pictorial elements, including glyphs (signs in a script) and graphic representations of the ornaments of the deities. It had a generative character that was expressed mainly in the fact that it combined basic signs to create new meanings. This article deals with the combinations between the following signs: the smoking mirror, the flint, the down ball and the skull, all belonging to the field of sacrifice and dismemberment of the human body. They were associated with each other and created the following codified and conventional combinations: mirror-flint, mirror-down, flint-skull, flint-obsidian, skull-down, and a composite pectoral called anahuatl. This article proposes a typology of these combinations, and sheds light on their meanings and the processes of their construction.

This article investigates Classic Maya understandings of two particular animal species: the (gray) fox and the armadillo. We use these species as a point of entry into Classic Maya categorizations of the non-human animal world, examining the salient biological and physical characteristics of those animals that Classic-period artists and scribes chose to highlight. Rather than accepting the creatures depicted on painted pottery or referenced in hieroglyphic texts as generalized examples of particular kinds (i.e., simply “a fox” or “an armadillo”), however, we show how the evidence from ancient art, historical accounts, and contemporary ethnography points to an emphasis on specific beings, often named individuals, who engage in particular behaviors and relate to other entities (both human and non-human) in distinctive ways. Although this article focuses exclusively on the fox and the armadillo, those species serve as examples through which we consider the limitations of applying Western taxonomic categories to other systems of knowledge, as well as the possibilities for how we might catch glimpses of radically different ways of organizing the world.

Botanical residues recovered from excavations in the Southeast Marketplace of Piedras Negras provide information about the healing and medical activities of the site's Classic period (a.d. 350–900) inhabitants, and point towards the intersection between commerce and medicine for the ancient Maya. The plants were likely exchanged at the market then used on-site for the purposes of healing. The botanical remains are complemented by both architectural and bioarchaeological evidence for healing at this locus, including a high concentration of sweatbaths and evidence for palliative tooth extraction. With the aid of ethnohistory, we identify health care practices potentially associated with the plant remains. However, we expand on basic understandings of “healing” with a critical look at how some medicinal plants may have been ritually invoked, even when never directly ingested or applied topically.

The island nature of the Aztec capital, Tenochtitlan, is an under-studied aspect in our understanding of this unique urban space, located in the Mexican highlands of Mesoamerica. The island location induces cross-links from aquatic and terrestrial paths to create connectivity and continuity within the lacustrine cultural landscape of the Basin of Mexico during the Postclassic period (a.d. 900–1521). Although Cortés described this city as the “Venice of the New World,” no specific and systematic investigation of facilities related to water transport has been carried out. In this article, I fill this gap through a study of navigation routes which were conceived to facilitate the continuous movement of people and goods through the numerous canals crisscrossing the Aztec capital, and which are identifiable by means of anthropic markers that respond to functional needs. Transition zones (piers, quays, shoreline areas), coordination zones (ports), and activity zones (customs facilities, warehouses, bridges, sacred sites) are all related to the practice of water transport and intimately related to terrestrial roads. I identify and locate these areas using a multidisciplinary methodology based on archaeological data, ethnohistorical testimonies, and pictographic and iconographic documents.

According to Purepecha oral tradition, the ancestors of the Uacusecha dynasty that ruled Michoacan at the beginning of the sixteenth century began their epic in the Zacapu region. The importance of this region also lies in the research carried out since the early 1980s that led to the elaboration of a regional sequence outlining the trajectory of pre-Hispanic societies centuries before the emergence of the Tarascan state.

New research carried out on the area since 2009 has clarified this reference framework and opened new perspectives. The research focused on the Malpaís volcanic flows and its immediate surroundings. It addressed the transformations experienced by pre-Hispanic societies between a.d. 500 and a.d. 1580, and their interactions with the volcanic environment with unprecedented analytical detail. The joint contributions of remote sensing, archaeological fieldwork, dating, and geological study participate in renewing a diachronic approach of this unique landscape of northern Michoacan.

This study examines artifact production using lithic, animal bone, and shell materials at the lowland Maya site of Ceibal, Guatemala, to explore the emergence and societal role of early crafting specialists. During the Middle Preclassic period (1000–350 b.c.), ancient Maya society went through a critical transition to sedentary settlements, including the development of large-scale monumental construction endeavors for ceremonial activities, increasingly nucleated settlement patterns, and the differential control of prestigious objects. Excavations across Ceibal recovered one of the largest Middle Preclassic assemblages of lithic and faunal material to date. We examine these materials in order to understand the nature of their manufacturing processes, the association between lithic production and bone/shell processing for meat and artifact production, and compare these activities with evidence from other Middle Preclassic sites and from the later Classic period. We find that Middle Preclassic middens are often disturbed or incorporated into later construction episodes over many generations, making the identification of such activities difficult, although not impossible, to identify archaeologically. Evidence for crafting is often found near ceremonial structures where Ceibal's early elite would have been present, suggesting that they were closely involved in the production process.

Recent in-depth research on the Nahua Corpus Xolotl, as well as on a large variety of compatible sources, has led to new insights on what were “boundaries” in preconquest Nahua thought. The present article proposes that our modern Western concept of borders and political boundaries was foreign to ancient Mexican societies and to Aztec-era polities in general. Consequently, the article aims to add a novel angle to our understanding of the notions of space, territoriality, and limits in the indigenous worldview in central Mexico during preconquest times, and their repercussions for the internal social and political relations that evolved within the Nahua-Acolhua ethnic states (altepetl). Furthermore, taking its cue from the Corpus Xolotl, the article reconsiders the validity of ethnic entities and polities in ancient Mexico and claims that many of these polities were ethnic and territorial amalgams, in which components of ethnic outsiders formed internal enclaves and powerbases. I argue that in ancient Mexico one is able to observe yet another kind of conceptualization of borders/frontiers: “enclosures with inclusion,” which served as the indigenous concept of porous and inclusive boundaries, well up to the era of the formation of the so-called Triple Alliance, and beyond.