Exaltations of the Cross Church was built before 1367. The brick Gothic church had three naves and star vaulting. In the 15th century the church was burnt by Hussites and again 1577 it suffered damages in the battle during the Danzig rebellion. Between 1585 and 1945 it was a Lutheran Church and survived from the World War II. Today Exaltations of the Cross Church is a Roman Catholic church. The richly decorated interior is well-preserved, including a Renaissance style pulpit from 1578.
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.