Untere Burg ('Lower Castle'), also known colloquially as Burg Alt-Schellenberg, is the smaller and newer one of the two ruined castles in Schellenberg. Its construction was finished around 1250. Its first appearance in written records is from 1317. The castle reached the pinnacle of its structural expansion around the year 1350. According to current estimates, it was inhabited until roughly the 16th century, when it was abandoned and ceased to function as a residence. In the following centuries, the castle lost its military purpose and became a ruin. In 1956, Franz Joseph II, Prince of Liechtenstein handed over ownership of the heavily overgrown ruin to the Historical Association of the Principality of Liechtenstein. This institution is the current owner and caretaker of the ruin and oversees its research, upkeep and preservation. The castle is freely open to tourists and accessible by foot or mountain bike via a local footpath. Untere Burg is one of the five existing castles in Liechtenstein and one of the three ruined ones in the country.
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.