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.
I have discovered online a very interesting classic journal article about Aztec autosacrifice by the esteemed Dr. Zelia Nuttall. Written in 1904, it lacks the benefits of recent scholarship, but it still remains a keystone work in understanding the specific form of autosacrifice that is bloodletting from the ears. Dr. Nuttall provides detailed description and discussion of the various specific forms of ear sacrifice, accompanied by extensive translation from numerous codices and photographs of pictorial depictions of this type of penance. If you are interested in learning more about how the Aztecs traditionally performed ear sacrifice, I strongly recommend following the link to read the article. Even better, as it is in the public domain, the full text is available to download as a PDF through Google Books!
Some highlights of this article are discussions of the close association of ear autosacrifice with the gods Tezcatlipoca, Mixcoatl, Huitzilopochtli, and Quetzalcoatl. Of particular interest during this veintana of Quecholli is the description of a special type of autosacrifice attributed to Mixcoatl, the God of the Hunt. The article includes several forms of ear sacrifice linked to specific veintanas, including Quecholli and Panquetzaliztli. Additionally, it describes a sacrifice offered on the day Nahui Ollin, the daysign of the current Sun, the Sun Four Movement.
Also interesting is Dr. Nuttall’s analysis of the jaguar/ocelot imagery surrounding Tezcatlipoca and his connection to the constellation Citlal-Xonecuilli, which is known today as either Ursa Major or Minor (a little help on which one, Shock?). [Edit — It’s Ursa Major. Thanks, Shock!] Instead of a bear, the Aztecs saw the constellation as a jaguar and a symbol of Tezcatlipoca. It reminded them of the time when Tezcatlipoca, acting as the First Sun, was chased from the sky by Quetzalcoatl and descended to Earth in the form of a great jaguar to devour the giants, the first people. That is why the constellation seems to swoop from its peak in the sky down to the horizon, reenacting this myth every day in the night sky.
My only irritation with this article is a few points where the good doctor strays from proper anthropological neutrality to make disparaging comments about the practice of autosacrifice, and to congratulate the Spaniards on stamping it out. I’ll admit it, I do derive a certain sly pleasure in discussing it here so that it’s not forgotten!