The Church of St. Anne is one of the leading examples of Polish Baroque architecture. The church was first mentioned in 1381 in the deed of donation of Sulisław I Nawoja of Grodziec. In 1407 the church was completely destroyed during a fire, but it was rebuilt the same year in the Gothic style by King Władysław II Jagiełło. The king also attached the Church formally to the Jagiellonian University by giving it the right to nominate the parish priest. In 1428 the choir was reconstructed and enlarged. By a charter dated October 27, 1535 St. Anne's was raised to the rank of a collegiate church.
In 1689 the Gothic edifice was demolished as it proved too small for the growing cult of Saint John Cantius, the patron saint of the Jagiellonian University who's laid to rest there. In 1689-1705 the new Baroque church was erected, modelled on Sant'Andrea della Valle in Rome. The architect was a Polonized Dutchman Tylman van Gameren, a chief architect at the court of John III Sobieski. The interior stucco decoration is the work of Baldassare Fontana, and the polychromy assisted by painters and brothers Carlo and Innocente Monti and Karl Dankwart of Nysa. The painting of St. Anne in the high altar is the work of Jerzy Siemiginowski-Eleuter, court painter of King John III Sobieski. The 18th-century paintings in the stalls showing the life of Saint Anne are by Szymon Czechowicz. In the transept there is an altar of the adoration of the cross to the left, and the tomb of John Cantius to the right.
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.