In prehispanic days, this construction was the entrance or exit of the central part of San Gervasio, leading to the coastal sites, which were reached by means of Sacbe 1. The pilgrims and traders would reach the famous sanctuary of the Goddess Ixchel and deposit an offering at the altar that lies in the middle of the vaulted passageway. here one can appreciate the kind of vaulting used, which is shaped like an inverted staircase, common on the east coast. "The Arch" dates from the Post Classic period (1200-1650 a.d.).