Church and Monastery of Saint Peter: Detail of the central portal, and small belltower, Los Pájaros, at center

The church forms part of the premises of the monastery of Benedictine nuns, which was founded in the mid-10th century and subsisted as it was until the 19th century (dissolved 1835). The church, which dates from the pre-Romanesque period, preserves part of the 10th century Greek cross and Corinthian capitals. The small bell-tower, called Los Pájaros, is also from the Romanesque period. The Gothic period dates from 1147-1322, with other 16th century additions. The complex was damaged and partly destroyed in 1873 and 1909; what remained was restored in 1945.