Expert: Ralph Salier - 3/6/2009

Question
I visited a small museum last month in western Mexico, there was a large rock with petroglypths of what looked somewhat like the Aztec calendar in Mexico City. My question: is there more than one Aztec calendar stone?

Answer
Hi Rick

There are several versions of the calendar both in stone and codex.  They do not completely agree with each other both in glyphs and in segmentation.  It may be that they are not all "pure" Aztec but may have been modified over time or based on language differences.

There are also a fair number of reproductions.