Adendorf castle is the successor of a high-medieval castle located to the west of today's site. The small castle hill is few hundred meters from the current palace and was in the 14th century owned by the family of Hüchelhoven.
Arnold von Adendorp built a new castle from 1337 at its present location. It was besieged and conquered by the army of Henry III, Landgrave of Upper Hesse, in the late 15th century.
In 1659-1663 the medieval castle was transformed as a representative Renaissance schloss. Another reconstruction took place in 1842. The changes included the filling of the moat between the outer bailey and main building.
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.