The Ronde Lutherse Kerk or Koepelkerk is a former Lutheran church designed by Adriaan Dortsman (ca. 1636-1682). It was opened in 1671. The organ was built by J Batz in 1830 and it was restored in 1983 by Flentrop Orgelbouw. In 1882 it was rebuilt after a fire. In 1935 the Lutherans left the building and it became a concert hall.
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.