The western tower of Wartensee castle was built in 1243 by Ritter Heinrich von Wartensee as a residential tower. By the marriage the tower went in 1377 to the brothers Walter and Diethelm Blarer from St. Gallen. The family Blarer owned Wartensee until 1719. The current appearance dates from the alterations made in 1843-1553 by English composer Robert Lucas Pearsall de Willsbridge. Today Wartensee is a hotel.
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.