Rawa Mazowiecka Castle is a Gothic style square formation castle located in the lowlands of the river Rawka and the river Rylka. Currently it is a renovated ruin.
According to the scriptures of Jan Długosz, the castle was built by Casimir III the Great, and the stronghold's function was to protect the southern borders of Masovia. Although reconstruction efforts have been raised by Franciszek Lanckoroński, the reconstruction was stopped, most likely due to the Partitions of Poland, after which the Prussian authorities ordered to deconstruct the ruins, only keeping the tower. The rest of the brick material was used for nearby housing. Currently the renovated tower is open to tourists, and the outline of the castle's former square formation has been reconstructed around the tower.
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.