St. Ursula Church is one of the oldest brick churches in Poland. It was erected in the years 1235-1247, probably as a private church of the owner Mściwój Pobóg. In 1601 a sacristy was added from the North. In 1726 the western corpus of the church was demolished and the nave was extended to the West. At the beginning of the 20th century a tower was added in the south-western corner of the church, as well as the northern chapel and a southern porch.
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.