Most of the Tulum’s buildings are short, boxy and devoid of ornamentation except for the city’s centerpiece: The Castillo. It was the largest building in Zamá but much smaller than several Mayan pyramids on the Yucatán Peninsula. Evidence suggests El Castillo was constructed in stages. The grand staircase leads to a platform at the temple entrance which is supported by upside-down serpent columns. At the corners are threatening masks borrowed from the Toltec culture. In the center is a craving of the Descending God, the deity believed to have been worshiped in this ancient Mayan community.