Bjørnkær is a 14th century castle mound consisting of two square castle embankments surrounded by a moat and an outer embankment. During excavations in the 1930s, the foundations of a small building were found on the eastern castle embankment. Inside, the building measures about 4.5 m x 6.5 m, and the remains of the entrance door can be seen in the west wall. The other walls have traces of windows. The remains of cobblestones were found outside the building. Bjørnkær was owned by nobleman Niels Kalf. His widow, Abel Puder, gave the castle to the Bishop of Århus in 1427.
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.