Astronomical Alignments at the Templo Mayor of Tenochtitlan, Mexico
In honor of the spring equinox, I’d like to share an interesting article by Ivan Šprajc that explores some theories regarding possible astronomical associations of the architecture of the Grand Temple. Mr. Šprajc is a Slovenian archaeoastronomy specialist with an interest in the ancient astronomical practices of the Aztec, Maya, and Teotihuacan peoples. This paper, “Astronomical Alignments at the Templo Mayor of Tenochtitlan, Mexico” is the result of the studies he conducted at the excavation site of the Huey Teocalli in Mexico City.
In this paper, Šprajc agrees with his predecessors Aveni, Calnek, Tichy, and Ponce de Leon that the Templo Mayor was indeed constructed to align with certain astrological phenomena and dates. This initial concept is partially based on some clues recorded by Mendieta that the feast of Tlacaxipehualiztli “fell when the sun was in the middle of Uchilobos [archaic Spanish spelling of Huitzilopochtli].”
The more traditional position, held by Aveni et al and supported by Leonardo López Luján in “The Offerings of the Templo Mayor of Tenochtitlan” (2006) holds that the festival’s beginning was marked by the perfect alignment of the sunrise between the two sanctuaries atop the Temple on the first day of the veintena according to Sahagun. To wit, Sahagun recorded that the festival month began on March 4/5 (depending on how you correct from the Julian to Gregorian calendar) and ended shortly after the vernal equinox.
Unlike his peers, Šprajc concludes that the festival of Xipe Totec was marked by the sun setting along the axis of the Teocalli. At that time, the sun would seem to vanish as it dropped into the V-shaped notch between the two shrines of Tlaloc and Huitzilopochtli. His conclusion partially stems from a slightly different measurement of the orientation of the temple than the other archaeologists, and his preference for Mendieta’s dating of the start and end of Tlacaxipehualiztli, which would start right around the vernal equinox and then end on about April 4th.
Who do I think is correct? I think the jury is still out. Both the sunrises and sunsets were marked by the priests with copal offerings and music, and both were involved in the flow of various festivals, so we know for sure that the scholars and clergy of Tenochtitlan assigned significance to both. Given the issue of varying estimates of how much the Templo Mayor has settled into the soft soil of the remains of Lake Texcoco, and differing theories on how much the structure has warped due to intentional destruction and pressure from the layering of Mexico City on top, and it becomes hard to present a bulletproof argument for either side.
Šprajc presents some additional interesting possibilities for alignments with Mount Tlamacas and Mount Tlaloc nearby, and a potential method of tracking the movement of the sun that possesses regular intervals of 20 days (matching an Aztec month) and 26 days (two Aztec weeks) that are intriguing. However, I generally consider Sahagun more reliable than Mendieta, as his research methods were among the best at the time, and modern study has tended to vindicate his records over those of historians working at a greater remove in time after the Conquest. There’s also the issue that Šprajc seems to be quite outnumbered when it comes to support for his alignment, and some of those who disagree with him, like Leonardo López Luján, have devoted decades of their lives to studying the Templo Mayor specifically. I’d also like to close with the possibility that everyone could be wrong — the tendency to see astronomical alignments under every rock and bush that were never intended by the people they’re studying has plagued archaeology for a very long time, and in the end, it could be the case here as well. Regardless, the debate is interesting and well worth reading, and the journal article contains a number of useful photographs and diagrams of deep within the layers of the Templo Mayor that are rewarding in and of themselves.
To download a full-text PDF copy of the journal article for free from the Inštitut za antropološke in prostorske študije (Institute of Anthropological and Spatial Studies), please click HERE. Alternatively, you can read it on-line at Issuu in simulated book format straight from your web browser by clicking HERE.
As a bonus, I’ve embedded a beautiful video recorded by Psydarketo below. It’s footage of the sun rising and aligning in the central doorway of the sanctuary atop the Mayan temple at Dzibilchaltun on March 20th, 2011 — last year’s spring equinox. It’s a similar technique to what I discussed above at the Templo Mayor, except that the sun is framed in the doorway rather than in the V-shaped space between twin sanctuaries. Close enough to help give a picture of how things would have looked in Tenochtitlan, and wonderful to watch in its own right.
Courtesy link to the original video at Psydarketo’s YouTube page.
Šprajc, I. (January 01, 2000). Astronomical alignments at the Templo Mayor of Tenochtitlan, Mexico.Archaeoastronomy, 31, 25, 11-40.
First Steps From Aztlan
This is the story of how the Aztecs began as a small band of wild Chichimec nomads and left their original home under the guidance of Huitzilopochtli, searching for their own promised land. In the epic saga focusing specifically on the rise of the Mexica and Huitzilopochtli, this legend comes after the Battle of Coatepec and before the rebellion of Malinalxochitl.
First Steps From Aztlan
As told by Cehualli
Long ago, after the seven tribes had parted ways at Chicomoztoc, the Place of Seven Caves, the Mexica lived as simple nomads in their homeland of Aztlan. They were a wild and hardy clan, not yet educated in the sophisticated ways of the Toltecs, but brave and adventurous. They lived by hunting the wilderness, always on the move in search of new game. In short, they were Chichimecs, barbarian nomads.
One day, in a year of the Flint Knife, one of the teomama, or priests who carried the sacred bundles, received a vision. It was the priest who carried Huitzilopochtli’s bundle (tlaquimilloli), the Teotl who was the special protector of the tribe. Huitzilopochtli told him that He had big plans for them. “Be bold! You will travel south to the unknown lands of Anahuac, to a place where your people will found a great empire. You will be numerous and powerful, feared in war. You will gather rich tribute, land, slaves, and sacrifices in My name.”
“How can this be?” replied the priest in awe. “We’re just a small clan of simple nomads, nothing like the mighty Toltecs of wondrous Tollan where Quetzalcoatl once ruled.”
Huitzilopochtli scoffed at his fear with all the bravado of a daring young warrior eager to test his skills. “Now you are small and weak, but if you follow Me, I will guard and guide you, destroying those who would harm you and leading you to victory. I promise you a sign when you have reached the right place — you will see an eagle perched on a nopal cactus, eating a heart. When you find this spot, build My temple there. Now, take heart and tell My wishes to the chieftains! I am impatient and long to start the journey!”
As the vision faded and the presence of the god left him, the priest went to tell His charge to the chiefs. They consulted among themselves and decided to trust Huitzilopochtli, the Protector of Men. “He’s never led us wrong before,” they said. “Even though these things seem impossible, we will trust Him and migrate south. Perhaps we will die, perhaps we will be a glorious empire after all. We will see!”
They gathered their poor possessions and set out from Aztlan, the White Place, a land to the northwest of the place they would eventually call home, Tenochtitlan. They were the seventh and youngest tribe to leave, but they would one day become the greatest of all, the Mexica-Tenochca, Aztecs.
A Brief Survey Of Historical Aztec Autosacrifice
Today I’m going to give a quick overview of the types of autosacrifice performed by the Aztecs during the days of the Empire in order shed some additional light on this very important religious practice.
Traditionally, the Aztecs would collect blood from their ears, lower legs (calf, shin, or just above the ankle), lip, tongue, or penis. The tools and methods used would vary depending on the worshipper’s preferences, the ritual context, and in at least some cases, the instruction of a priest. The Florentine Codex records the rite of confession to Tlazolteotl, and according to Sahagun, the confessor priest would prescribe required penances to atone for the disclosed sins — these penances often included various forms of bloodletting.
The most common methods of getting the blood were by pricking the flesh with a sharp instrument. Maguey (agave) spines are the tool most frequently mentioned in the historical texts, though slivers of obsidian and special perforators made from a spike-shaped piece of sharpened bone were also used. (Incidentally, Quetzalcoatl, the First Priest, is often shown in the codices holding a bone perforator or two.) From what I’ve read, it seems that maguey spines were particularly associated with piercing the ears and the legs, probably because their large size would be sufficient to draw blood from the legs. The individual would pierce himself or herself in the chosen location, and once the thorns were sufficiently bloodied, would carefully arrange them on a bed of cut fir boughs, or stick them into a ball of dried grass.
Alternatively, the Aztecs would nick their earlobes with an obsidian knife, and the blood would be allowed to drip on the ground, be sprinkled into a fire, or flicked towards the sun, symbolically giving the life-energy to Tonatiuh.
Finally, there was a final type of personal blood offering, that of passing straws or cords through the body. This rather severe form of autosacrifice was a multi-step process. The person would first select a place to pierce. In the texts I’ve read, the tongue seems to be the most common choice for this kind, though the ears, legs, and possibly penis were used as well. (I haven’t the slightest idea of how that last one worked, it’s definitely not something the Spanish friars would’ve recorded the details of!) Then they would poke a hole with a sharp sliver of obsidian, and pull a number of straws or thin cords through the hole. This sacrifice was typically done in a temple or at the side of the road. Wherever it was done, the bloodied straws were left behind as offerings. Interestingly, this practice was apparently only done on days that had a proper sign according to the ritual calendar (tonalpohualli), but I’ve never come across what daysigns those were. Finally, this practice of drawing straws is usually listed as a priestly activity, not something done by ordinary people, though occasionally the nobility appear to have done it as well. Priests who did this often were obvious, as their tongues would be extremely scarred, damaged to the point where they were said to have had difficulty in speaking.
Quetzalcoatl Holding Bone Perforators, Codex Borgia