This 16th-century complex was founded by the Augustinians. Its massive construction is crowned with battlements and buttresses with the typical pointed finish, making it one of the best-preserved colonial buildings in the area.

The temple consists of a single nave covered by a barrel vault, and its facade is characterized by its simplicity.

Three chapels have been preserved, and one of them, dedicated to the Señor de Tepalcingo, features elaborate decoration with vegetal and geometric motifs. The open chapel with three arches and a bell-gable located to the north of the temple is also remarkable.

Inside, you can admire a tempera painting depicting the Last Supper and a fresco representing the genealogical tree of the Augustinians. The mural paintings, with their intricate ornamental details, are astonishing, and there are also images of saints on the walls.

The complex has Mudéjar-style geometric decorations and a spacious tree-lined atrium bounded by a wall.

A peculiar aspect of Atlatlahuacan is that it still preserves ancient traditions, including Latin masses and facing the altar with their backs to the public, along with beautiful Gregorian chants.