Geta Church is believed to be built in the 1460s, and was dedicated to St. George. It was used as a chapel until the beginning of the 20th century. The altarpiece was donated in 1685. The Empire-style pulpit is from 1842. The major reconstructions have been done in the 17th century, and in 1842. The belfry was built in the middle of the 17th century, but it has been reconstructed in 1685 and in the 19th century.
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.