St Catherine's Church is the oldest church in Gdańsk. The first record dates from 1185, when Prince Sobieslaw I built a wooden church. It was replaced with a stone church in 1227-1239. St. Catherine’s church evolved over centuries and only reached its final shape in the mid-15th century. It was a Protestant church from 1545 until 1945, after which it became a Roman Catholic church. There are several magnificent details in the church, like Anton Möller’s triptych painted in 1563-1611.
The tower was destroyed in 1945 in World War II, but rebuilt again in the following decades. Today the church hosts a Tower Clock Museum.
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.