St. Nicholas' Church stands besides one of Germany's oldest manmade waterways, the Frischen Grube, and was dedicated as the church for sailors and fishermen. The 37m high nave is almost the height of the Marienkirche in Lübeck. The protruding northern and southern vestibules that resemble the arms of a transept are also a particular feature of the church. The lavishly adorned southern gable takes a special place in art of brick construction due to its wealth of glazed figured bricks. From St. Nikolai's medieval interior decoration survives a late-thirteenthcentury granite baptismal font and a maritime altarpiece made in the early nineteenthcentury, but the church's interior is chiefly characterized by completely preserved baroque furnishings.
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.