The largest church in Bielefeld is the Neustädter Marienkirche, a Gothic hall church dating back to 1293, completed 1512. Historically speaking, this building is considered to be the most precious possession of the town. It was the starting point of the Protestant Reformation in Bielefeld in 1553. A valuable wing-altar with 13 pictures, known as the Marienaltar is also kept inside.
The baroque spires were destroyed in World War II and later replaced by two unusually-shaped 'Gothic' clocktowers. The altarpiece of the Bielefeld church Neustädter Marienkirche from around 1400 is among the most prominent masterpieces of artwork of the German Middle Ages. Two of the altarpieces, The Flagellation and The Crucifixion are now in the collection of the Metropolitan Museum of Art in New York.
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.