Built entirely in 1248, the church of the Trinitarians is one of the finest expressions of Gothic art in Luxembourg. The large choir was added in 1644. The main altar, made in 1758 in Rococo style, is the work of the artist Michel Weiler. Beside the church, the former cloister of the Trinitarians (1250). The recumbent effigy of Marie de Spanheim (approx. 1400) preserves the memory of the last descendant of the Counts of Vianden.
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.