Uniejów Castle castle was built between 1360-1365 on the site of a former wooden fortress, destroyed after a raid by the Teutonic Knights in 1331. The initiator of the construction of the castle was Gniezno's Archbishop Jarosław Bogoria Skotnicki, one of the closest associates to Casimir III the Great.
The building was greatly expanded and modernised between 1525-1534, when after a fire most of the castle's Gothic characteristics had gone. The stronghold had ended's its militaristic significance in the seventeenth century, when the castle became a residence. In 1836 the castle was taken over by the House of Toll, an Estonian family. In 1848, Aleksander Toll had reconstructed the castle into a Classical architectural style. The castle in Uniejów is a prime example of accretion of architectural styles.
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.