The well-preserved Drena Castle ruins stands on the rock overlooking the deep gorge of the Salagoni River. Built in the 12th century, Drena was probably erected over a prehistoric village. During the Middle Ages, the castle became an important stronghold to control the road connecting Trento and Lake Garda. Unassailable from the flames, the castle is defended by two rows of walls and has been constructed in a dominating position over a gorge - rendering it impregnable to the techniques in use at the time. The castle is mostly Romanesque, but includes a number of Gothic features and 16th century structures.
Frequently contended, in 1703 Drena castle was destroyed by French troops led by General Vendome as well as practically all the castles in the area.
Recently refurbished, Castel Drena can be visited throughout the year, and uses to host numerous cultural events, as well as a permanent exhibition. Overlooking the complex is the 25 metres high fourteenth-century tower, the top of which affords a view over the evocative Marocche stone quarry.
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.