The ruins of the former Markaz castle at the end of Vár crag lie about 2 km way from Markaz. It is assumed that the Kompolti family that belonged to the Aba genus had it built in the 1270-1280's. The castle did not have significance from a military point of view as it was mainly used for recreation and hunting by the owners. The palace was constructed in the tiny and narrow castle with a tiny yard. On the southeast side of the rectangular castle the 6-metre wall still exists. The castle is believed to have been demolished during the Turkish occupation. There is a spectacular view from the castle to the north to the castle valley and Abasár why it is worth climbing.
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.