St. Stephen's Abbey, dedicated to Saint Stephen, was founded in 969 by Saint Ulrich, Bishop of Augsburg, and used by Augustinian canonesses. It was dissolved in the secularisation of Bavaria in 1803, and the premises passed into the possession of the town. The army used the site for a few years as a quartermaster's store.
In 1828 King Ludwig I of Bavaria founded a grammar school here, as a successor to the former Jesuit college of St. Salvator (1582–1807). In 1835 he established the Benedictine monastery and entrusted it with the running of the school. The buildings were entirely destroyed in 1944 but have been re-built.
The monks continue to run the school and boarding house, and are engaged in pastoral and youth work.
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.