Calpan was subdued by Cortés personally in 1522 and the Franciscans arrived here to build the San Andrés Apostol monastery complex in 1548 under Juan de Alameda. The capillas posas were begun in 1555. The façade is Plateresque with Moorish influence. It is adorned with Isabelina volutes on the entrance arch with shells on top. There is one bell tower on the right-hand side. Its single nave is wide, with a choir which was initially reserved for the friars so that they would not be seen by the general populace. The cloister is now a site museum, with its entrance through the open chapel.