Ilmmünster Abbey was formerly a collegiate foundation and originally a Benedictine monastery. The original site was a Benedictine monastery, founded in about 762 by the brothers Adalbert and Otker, traditionally supposed to be members of the Huosi, an ancient Bavarian noble family. The monastery was dedicated to Saints Arsatius, whose relics were here, and Quirinus, whose relics were at Tegernsee Abbey, founded by the same brothers, to which Ilmmünster was affiliated.
A collegiate foundation was also set up here in 1060. In 1493, the monastery was transferred to the Frauenstift in Munich, leaving the site for the Kollegiatstift. The property and assets were sold off in 1802 during secularisation, but the impressive church remains.
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.