Drzewica Castle was built between 1527 and 1535 by Archbishop of Gniezno Maciej Drzewicki. The Archbishop built the castle on the peripheries of the town, by the river Drzewiczka and encircled the fortress with moats, separated by a bulwark. The building's plan is based on a regular rectangular shape. Its defence systems are based on four square towers located in each corner of the castle.
The building burned down in 1814, remaining a well preserved ruin. Thus, the castle did not undergo any later modifications, remaining one of Poland's best preserved residences from the first part of the sixteenth-century.
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.