After the Augustinian Order received permission from the Hirsau Monastery to establish a monastery in Weil in 1294, the foundation stone of the monastery complex was laid in 1295. The building was completed in the course of the 15th century, and in 1492 the Gothic tracery windows with inscriptions on the history of the order were installed in the cloister.
As a result of the Augustinians' conscientious commemoration of the dead, the monastery was very popular with the citizens as a burial place. The building today consists of three wings: the east wing, the north wing and the west wing. The east wing housed the prior's living quarters and the dining room, with an inscription in stucco relief "You have touched our hearts with your love". The north wing served as a dormitory and the west wing housed guest rooms. For over 50 years, the monastery fought against the settlement of the Capuchins, as the city with its predominantly Protestant environment seemed too small for two mendicant orders. In 1812, the monastery was closed after the end of the Old Empire and the associated mediatization and secularization.
The Augustinian monastery was originally a four-winged complex - the Augustinian church formed the south wing. This church was demolished when the monastery was closed in 1812. Today, the west wing houses the city archives, and the east wing houses the Catholic parish office. The upper floors serve as club rooms, and the well-known Weiler youth center also has its place here.