San Andrés

San Andrés is a pre-Columbian site in El Salvador, whose occupation began around the year 900 BC as an agricultural town in the valley of Zapotitán in the department of La Libertad. This early establishment was vacated by the year 250 because of the enormous eruption of the caldera of Lago Ilopango, and was occupied again in the 5th Century, along with many other sites in the valley of Zapotitán. Between 600 and 900 AD, San Andrés was the capital of a Maya polity with supremacy over the other establishments of Valle de Zapotitán.

The residential area has not yet been well studied. The investigations and excavations in San Andrés have been primarily of the political-ceremonial center and have revealed that it was divided into the South Seat and the North Seat. In the year 600, the South Seat was filled with adobe to construct the Acropolis, which contains ceremonial and political structures.