In the 11th century a chapel dedicated to St. Clement was built here. In the medieval period, the Dominicans too over and in 1556 the Jesuits transformed it into a college. As Wikipedian says:
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.What I toured was the library and astronomical observatory section. In the photo above you see the library which is now essentially a rare book collection for the National Library.
