Quoile Castle is a 16th-century tower house, which was inhabited into the 18th century. The south corner of the building has fallen down and shows a cross-section of the castle. In the north east wall the doorway has been rebuilt and gives access to a straight mural stairway. This is protected by murder-holes at the bottom and at the top. The inner doorway at the ground floor opens into a chamber with a stone vault and many small gun-loops. Beyond this is a second similar chamber. The first floor has two rooms and one of them has a fireplace. The second floor is reached by another straight stairway within the north west wall. There is another fireplace at this level.
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.