Tynnelsö estate was first mentioned in 1282. Since 1306 it belonged to the Diocese of Strängnäs. During the 1490s bishop Kort Rogge built the first stone castle and the first floor is still the original. In 1522 Tynnelsö was acquired by Gustav Vasa and it belonged to the royal family until 1636, but was again later returned to the crown (during the Great Reduction in 1681). The current square-formed castle was built to the present appearance in the 1590s. In the 18th century Tynnelsö castle was abandoned and left to decay. The major restoration was made in 1826-1827.
Today the castle is closed due the restoration, which should be started in future. The surrounding garden includes lot of lime trees and a villa built in 1876.
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.