He said the platform, which is still being unearthed, was gradually uncovered over the preceding months. It is covered with at least 19 serpent heads, each about a half-yard (meter) long.
Barrera said accounts from the 1500s suggested the platform was also used in a colorful ceremony in which an Aztec priest would descend from the nearby pyramid with a snake made of paper and burn it on the platform.
Records indicate there were a total of five such platforms in the temple complex. One was found several years ago, but that platform was farther from the ritually important spot at the foot of the pyramid, where the most recent finding was made.
Story: Jennifer Viegas | Photo: Archaeological Field School