Sulejów Abbey was a Cistercian abbey founded in 1176 by the duke Kazimierz II the Just. The town of Sulejów grew up round it. The most notable parts of the abbey are the Romanesque church of Saint Thomas Becket of Canterbury and Romanesque fortifications which stopped the Mongol Hordes in the 13th century.
The monastery was dissolved in 1810. After many years of industrial and business use the surviving buildings are now used by the present parish.
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.