Kirchberg Castle was initially built around 1240. The first documented mention in 1265 refers to Raben von Kirchberg. The complex was expanded until 1400. Ludwig Kasimir von Hohenlohe bought the castle back in 1562. Under Kasimir and his sons, extensive changes took place: between 1590 and 1597, the medieval castle was transformed into a Renaissance palace. From this period date the hall building, erected on the site of the first castle, two cross buildings, and connecting passages, creating a four-wing complex with bastions facing the town.
Leopoldo Retti planned the conversion into a residence palace under Count and later Prince Karl August of Hohenlohe-Kirchberg, which took place from 1738 to 1745.
The building complex now includes a café, a hotel with conference rooms, and artist studios.
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.