Religion was the organizing principle of Aztec civilization. Every aspect of Mexica life, from the layout of Tenochtitlan to the structure of the social order, from the conduct of war to the planting of maize, was conceived in religious terms. The Mexica believed that the universe was a delicate balance of opposing forces, and that the gods required constant feeding, through offerings and sacrifice, to keep the cosmos in motion. The most powerful deities of the Mexica, Huitzilopochtli, Tlaloc, and Quetzalcoatl, were worshipped in the great Templo Mayor in the sacred precinct of Tenochtitlan, and their images were carried to war and brought back in triumph. The Mexica religion was not a unified, doctrinal system in the way that Christianity or Islam is. It was a syncretic accumulation of beliefs drawn from many sources, including the older Toltec traditions of central Mexico, the Teotihuacan culture that had preceded the Mexica by nearly a millennium, and the beliefs of the many peoples whom the Mexica had absorbed or conquered in the course of their imperial expansion. The earth itself was conceived as a great caiman floating in the primal waters, an idea shared with other Mesoamerican cultures. Time was organized in interlocking cycles, the Tonalpohualli of 260 days and the Xiuhpohualli of 365 days, that together governed every aspect of religious and political life. The 260-day ritual calendar, with its twenty signs of thirteen numbers, determined the timing of religious festivals, the selection of sacrificial victims, and the naming of children. The 365-day solar calendar, with its eighteen months of twenty days plus five extra days, organized the agricultural year and the seasonal festivals.
The Mexica, like other Mesoamerican peoples, believed that the world had been created and destroyed four times before the present era, the age of the Fifth Sun. Each previous age had ended in catastrophe. The first sun had been destroyed by jaguars, the second by wind, the third by a rain of fire, and the fourth by a great flood. The present age, the age of the Fifth Sun, was destined to end in earthquakes, a fate that could be postponed only by proper ritual and by the constant feeding of the gods with blood and human hearts. This awareness of cosmic fragility gave Mexica religion its characteristic tone of anxious urgency. Every sacrifice, every festival, every public act of worship was in some sense a holding action against the end of the world.
The Gods of the Mexica
The Mexica pantheon was vast and complex, comprising hundreds of deities, each with its own attributes, mythology, and ritual requirements. The gods were conceived as powerful but unpredictable beings who could be propitiated but never fully controlled. They were associated with natural forces, with the calendar, with human activities, and with the founding myths of the Mexica state. The most important gods were organized in pairs, with masculine and feminine counterparts, and many had both a kind and a fearsome aspect. The dualism of the Mexica worldview is particularly evident in the pairing of Quetzalcoatl and Tezcatlipoca, the feathered serpent and the night god, who together represented the complementary forces of light and darkness, order and chaos.
The most important deity in the Mexica state religion was Huitzilopochtli, the tribal god of the Mexica, the left-handed hummingbird, who had guided the Mexica from Aztlan and who was the patron of war and of the sun. Huitzilopochtli was associated with the young sun, with the south, with the color blue, and with the hummingbird. He was conceived as a warrior who daily defeated the moon and the stars in a cosmic battle that mirrored Mexica warfare. The great temple of Huitzilopochtli, the Templo Mayor, was the religious and political center of Tenochtitlan, and his worship was the principal purpose of the Mexica state. After Huitzilopochtli, the most important gods were Tlaloc, the rain god, who shared the Templo Mayor with Huitzilopochtli, and the high gods Quetzalcoatl, Tezcatlipoca, Huitzilopochtli, and Tlaloc, who were known as the four Tezcatlipocas, the bearers of the cosmic order.
The Mexica were not the only people who worshipped these gods, and many of them, particularly Quetzalcoatl and Tezcatlipoca, had been worshipped in the Valley of Mexico for centuries before the Mexica arrived. The Mexica absorbed these older cults, gave them new emphases, and made them the basis of a state religion that was more demanding and more violent than the older Toltec versions. The cult of Huitzilopochtli, in particular, was an innovation of the Mexica, and it was the central religious fact of their state.
Human Sacrifice and Bloodletting
The most controversial feature of Mexica religion, both in the eyes of the Spanish conquerors and in modern historical debate, was the practice of human sacrifice on a scale perhaps extraordinary in world history. The Mexica believed that the gods themselves had shed their blood to bring the present age into being, and that the cosmos could not be sustained without a return of that precious substance. The tears of the newborn sun in the legend of the Five Suns had to be repaid with the tears, and the blood, of human beings. Human sacrifice was not, on this view, an act of cruelty: it was a cosmic transaction, a necessary renewal of the debt that humans owed to the gods. Sacrificial victims were drawn from many sources, including war captives from the flower wars, slaves purchased in the Tlatelolco market, and, in some cases, young men and women offered up by their own families. The most common form of sacrifice was heart extraction, in which the victim was held down on a stone block and the priest cut out the still-beating heart with an obsidian knife, offering it to the sun or to the god of the temple. The body was then thrown down the steps of the temple, and the head was placed on a skull rack, the tzompantli, that stood beside the temple.
The scale of Mexica sacrifice is hard to estimate, and the most extravagant Spanish claims, including reports of tens of thousands of victims in a single dedication, are not credible. Modern estimates suggest that the number of victims sacrificed annually in Tenochtitlan was in the hundreds, perhaps a few thousand, which is large in absolute terms but smaller than the figures the Spanish and their indigenous informants sometimes gave. The Mexica also practiced a wide range of other forms of bodily offering, including bloodletting from the tongue, ears, and genitals, autosacrifice that produced relatively small amounts of blood but that was repeated frequently throughout the year.
The interpretation of Mexica sacrifice is one of the great debates in the history of religion. Spanish chroniclers, who were horrified by the practice, used it to justify the conquest. Modern scholars, working with indigenous sources, have tried to understand it on its own terms, as a response to the perceived fragility of the cosmos and to the Mexica’s sense of historical mission. Recent archaeological work, particularly the discovery of the great skull rack at the Templo Mayor in 2015, has provided new evidence for the scale of sacrifice and has confirmed the importance of the practice in Mexica state religion.
Priests and Religious Specialists
The religious life of the Mexica was directed by a large and highly organized class of priests, called tlamacazqui in Nahuatl. Priests were responsible for the maintenance of the temples, the performance of rituals, the interpretation of the calendar, the training of novices, and the education of the young in the calmecac schools. The high priests of Tenochtitlan, who served the Templo Mayor, were among the most powerful figures in Mexica society, second only to the Tlatoani himself. Each god had his or her own priesthood, with its own rituals, dress, and privileges. The priests of Quetzalcoatl, for example, were noted for their austere and ascetic life, while the priests of Xipe Totec, the flayed god, wore the flayed skins of sacrificial victims.
Religious specialists were not limited to priests. The Mexica also had a large class of diviners and healers, called ticitl, who were responsible for the medical, magical, and divinatory needs of the population. They were trained in the calmecac and in special schools attached to the major temples. They used a wide range of techniques, including the casting of maize grains or the reading of the calendar, to determine the cause of illness or misfortune, and they prescribed a combination of herbal remedies, bloodletting, and ritual acts to restore balance. The role of the religious specialist in Mexica society was, in many respects, analogous to the role of the medical doctor in modern societies, combining practical knowledge with a religious framework for understanding human suffering.
Religious Geography and Sacred Places
The Mexica imagined their world as a sacred space, divided into quarters and populated with shrines, temples, and holy mountains. The most important sacred site was the Templo Mayor in Tenochtitlan, the great double pyramid that stood at the center of the sacred precinct of the city. The Templo Mayor, dedicated jointly to Huitzilopochtli and Tlaloc, was the religious center of the Mexica state and the destination of pilgrims from across the empire. The temple was rebuilt and enlarged several times during the history of Tenochtitlan, most famously in 1487 when the seventh and final version was dedicated in a ceremony that, according to some sources, involved the sacrifice of thousands of victims.
Beyond the Templo Mayor, the Mexica recognized many other sacred sites. The sacred mountains around the Valley of Mexico, particularly the volcanoes Popocatépetl and Iztaccíhuatl, were considered to be the dwelling places of the gods. The great pyramid of Cholula, dedicated to Quetzalcoatl, was a major pilgrimage site. The caves to the north of the Valley of Mexico, particularly the cave of Chicomoztoc, the “place of the seven caves,” were identified with the ancestral home of the Nahua peoples. The great lake itself, Lake Texcoco, was a sacred place, and the white herons that lived in its marshes were considered to be messengers of the gods.
Mythology and the Cosmic Order
Mexica mythology, like Mexica religion more generally, was not a single coherent system but a corpus of stories, images, and ritual prescriptions drawn from many sources. The most important mythological cycle was the creation myth, the story of the five cosmic eras and the birth of the present age. According to this myth, the gods had created humanity four times before, only to destroy each previous age in turn. The present age, the age of the Fifth Sun, was created by the god Nanahuatzin, who became the sun, and by Tecciztecatl, who became the moon. The gods were required to sacrifice themselves to set the cosmos in motion, and the Mexica believed that they themselves were required to continue this sacrifice to keep the cosmos in motion.
Other important myths included the story of the birth of Huitzilopochtli, the tale of the five creator gods, the legend of Quetzalcoatl and the invention of the calendar, the story of the creation of humans from the bones of the previous age, and many others. These myths were not written down in the Western sense but were preserved in the codices, in ritual performances, in songs, and in oral tradition. The Spanish chroniclers, particularly Bernardino de Sahagún, recorded many of these myths in the sixteenth century, and the surviving records are now the principal source for the religious imagination of the Mexica.
Rituals, Festivals, and the Religious Year
The Mexica religious year was organized around a series of major festivals, called ceuitl in Nahuatl, that combined public ritual, theatrical performance, sacrifice, feasting, and social inversion. The eighteen months of the solar calendar each had their own festival, and many of the 260 days of the ritual calendar had their own observances. The most important festivals included Toxcatl, the month of the dry season, in honor of Tezcatlipoca; Etzalcualiztli, in honor of Tlaloc; Tlaxochimaco, in honor of Huitzilopochtli; and the great month of Panquetzaliztli, in which the Mexica celebrated the birth of Huitzilopochtli. The New Fire Ceremony, which occurred once every fifty-two years at the end of a complete calendar round, was the most solemn and important of all Mexica rituals. It involved the extinguishing of all fires in the Valley of Mexico, the lighting of a new fire on the breast of a sacrificial victim, and the carrying of the new fire to every settlement in the valley, symbolically re-creating the cosmos and ensuring the continuation of the Fifth Sun.
Religious ritual was not limited to public festivals. The Mexica also practiced a wide range of personal devotions, including household rituals, ancestor veneration, and the use of personal deities called tonalli. The tonalli was a portion of the divine force that resided in each person, associated with the day of their birth, and it required personal attention and care. The Mexica prayed to their tonalli at the beginning of each day, and they observed the days of the calendar that were sacred to their personal deity.
Religious Change and the Spanish Conquest
The Spanish conquest of 1521 was followed by a systematic campaign to convert the Mexica to Christianity and to suppress the old religious practices. The great temples of Tenochtitlan were destroyed, and churches were built on or near the same sites. The Templo Mayor was replaced by the Cathedral of Mexico City, although the original site is still visible in the archaeological zone today. The traditional priesthood was abolished, and the old religious specialists were persecuted. Idols were destroyed, and the practice of human sacrifice was outlawed, with the threat of severe punishment for those who persisted in the old ways.
The conversion of the Mexica was, in many respects, a slow and incomplete process. While the formal apparatus of the old religion was suppressed, many of its elements survived in the folk Catholicism that developed in the following centuries. The cult of the Virgin of Guadalupe, which appeared in Mexico in 1531, has often been interpreted as a syncretic religious phenomenon that drew on both Christian and indigenous elements. The cult of the dead, the Day of the Dead, which is celebrated in Mexico every November 1 and 2, has clear pre-conquest antecedents. The traditional Nahuatl language, although increasingly replaced by Spanish, persisted in many communities, and the indigenous calendar continued to be used for agricultural and ritual purposes long after the conquest. The persistence of indigenous religious practice in the face of intense Christian pressure is one of the most distinctive features of post-conquest Mexican history.
The Study of Aztec Religion
The modern study of Aztec religion depends on a rich and complex body of sources, including the historical codices prepared in the pre-conquest and early colonial periods, the writings of Spanish chroniclers and friars, particularly the Florentine Codex of Sahagún, the work of indigenous chroniclers in Nahuatl and Spanish, and the archaeological evidence of the temples and sacred sites. Modern scholars have done much to recover the indigenous perspective on Mexica religion and to correct the distortions of the early Spanish accounts. Important figures in this recovery include the anthropologist Bernardino de Sahagún himself, who worked with indigenous collaborators, the historians of the nineteenth and twentieth centuries who pioneered the study of Nahuatl, and modern scholars such as Henry B. Nicholson, Eduardo Matos Moctezuma, Leonardo López Luján, and others who have combined archaeological and ethnohistorical research to produce a richer and more accurate understanding of Mexica religious life.
The articles linked throughout this overview, and gathered in this section of the encyclopedia, offer more detailed treatments of every aspect of Aztec religion and mythology, from the major gods to the ritual calendar, from the creation myth to the human sacrifice that was its most controversial feature.
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See also:
- Major Gods of the Aztec Pantheon — Huitzilopochtli, Tlaloc, Quetzalcoatl, and others
- Aztec Creation Myth and the Five Suns — the origin of the present age
- Human Sacrifice in Aztec Religion — the practice at the heart of Mexica state religion
- Aztec Rituals, Festivals, and Ceremonies — the religious year
- Sacred Sites, Temples, and Religious Geography — the geography of Mexica religion
- History of the Aztec Civilization — the historical context of Mexica religion
- Aztec Society and Daily Life — the social context of religious belief