Brahelinna ("Brahe Castle") was built by the Swedish soldier and stateman Per (Pietari) Brahe in 1646–1669. Brahe was a Governor General in Finland and Ristiina town part of his fiefdom. Brahelinna contained 15-20 rooms and was used for living from the year 1657. Some planned parts were never completed.
Brahelinna was abandoned during the Great Northern War in the beginning of the 18th century and finally demolished about 100 years later. Today there are some ruins (surrounding wall, cellar and some other parts) left and restored.
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.