The red brick St. George's Church was built in 1909 as a garrison church for tsarist troops stationed in the city. The classic neo-Byzantine building was taken over by the city’s Catholics in 1919 and remodelled along less Orthodox lines in 1923. Suffering the usual Soviet fates and misfortunes, the building was used for non-religious purposes for many years before being returned to the Catholic Church and subsequently consecrated once more in 1999.
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.