Mentioned for the first time in 1018, the St. Mary's Church, owned by the bishops of Elne, was acquired by count Wilfred II of Cerdanya, who made their capital in the town, in 1025. In 1094 count William I ordered the construction of a monastery here, which was founded in 1097 and entrusted to the Augustinians.
Until 1167, the priory acquired numerous privileges and possessions, including castles and villages. In 1356 King Peter III of Aragon ceded to the monks the old palace of the counts.
In the 14th century the church was fortified with a line of walls featuring pyramidal merlons. The priory continued to increase in importance until its secularization in 1592. After the French Revolution in 1789 it was repeatedly modified.
The church, in Romanesque style, has a façade in pink marble, surmounted by a tympanum decorated by a Madonna enthroned with Child and Angels. The columns supporting the archivolts have capitals with rampaging lions, palms and sheep. The circular apse features exteriorly Lombard bands and a sawtooth-shaped frieze, as well as three windows with archivolts over small columns.
The interior is on a nave and two aisles. It houses a retablo by Jaume Cascalls (1345). The bell tower is in Lombard Romanesque style; it has Lombard bands decorating each of the three storey, the middle one having two windows and the upper one a large arch.
References:The Clementinum is a historic complex of buildings in Prague. Until recently the complex hosted the National, University and Technical libraries, the City Library also being located nearby on Mariánské Náměstí. The Technical library and the Municipal library have moved to the Prague National Technical Library at Technická 6 since 2009. It is currently in use as the National Library of the Czech Republic.
Its history dates from the existence of a chapel dedicated to Saint Clement in the 11th century. A Dominican monastery was founded in the medieval period, which was transformed in 1556 to a Jesuit college. In 1622 the Jesuits transferred the library of Charles University to the Klementinum, and the college was merged with the University in 1654. The Jesuits remained until 1773, when the Klementinum was established as an observatory, library, and university by the Empress Maria Theresa of Austria.