Podčetrtek belongs among the oldest castles in Slovenia. It was once located at an old national border, at Sotla river facing Croatia or Hungary. Podčetrtek is located in the area which already in 1071 became a property of Krško diocese. The construction of the castle can be dated to a time after the first third of the 12th century. First written record dates from 1361.
On 12th of November 1441 bishop of Krško Johan temporarily gave his castles Pilštanj, Podčetrtek, Bizeljsko and Mokronog to emperor Friderik IV who kept them until 1445, Afterwards the castle was governed by managers and between 1479 and 1490 it was in the hands of Hungarian army. In 1515 the castle succumbed to peasant revolt.
In 1527 the castle possession was moved to Hans Tattenbach and his successors leased and rented the castle and in 1612 Krško diocese imparted them the castle as heritable or private possession. At the execution of Erazem Tattenbach in 1628 the castle was confiscated by the province from which Ignac Attems. The castle was completely renovated in 1874 and remained a property of Attems' until the World War II.
After the war when the castle became a general public property it served various purposes and gradually it was soon completely robbed. Only a few artworks were rescued and are stored by Posavski muzej in Brežice. Nowadays it is abandoned.
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.