Cuauhxicalli Eagle Bowl Ston

1790:Workers doing repairs in Mexico City unearth a massive stone bearing ancient symbols. It turns out to be a representation of the Aztec calendar and will eventually become a national treasure.

The disc-shaped stone measured 12 feet in diameter and 3 feet thick. It was covered with pagan symbols. The Spanish had contemptuously buried it underneath the Zocalo, or central plaza of the city, soon after they toppled the Aztec empire in 1521. The new rulers also tore down the pagan grand temple and, at the opposite end of the plaza, built a large cathedral to worship their own deity.

Soon after its 1790 discovery, the 25-ton stone was again ritually subjugated to the new religion, this time by embedding it in the wall of the cathedral’s western tower

[link to www.wired.com]