The original church was erected in 1150 over a roman temple build in honor of the goddess Cybele, the mother-God. Three times destroyed, three times has been rebuilt.
In 1363, a fire completely destroyed the church. In 1600 it was partially destroyed in a cyclone before succumbing to the earthquake in 1755. Queen Maria I of Portugal, in 1783 ordered to rebuild the church again.
The Vestibule of this church, in manueline style is considered one of the workmanships of its time.
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.