Laufen Castle is a square-shaped castle overlooking the Salzach river that was built for the Archbishop of Salzburg in the 15th century. It is assumed to be built on the ruins of an ancient Roman structure and was first mentioned in the reign of Bishop Vergilius of Salzburg, and once again in the 13th century. On March 29, 1166, Emperor Barbarossa held court here.
During World War II the castle was used first as a prisoner-of-war camp for officers, Oflag VII-C. Then In May 1942 the officers were transferred to another camp, and the castle was used as an internment camp Ilag VII housing some hundreds of men deported from the Channel Islands of Jersey and Guernsey and some American civilians that had been caught in Europe by the declaration of war by Germany on the United States on 11 December 1941.
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.