Schönburg Castle was first mentioned in history between the years 911 and 1166. From the 12th century, the Dukes of Schönburg ruled over the town of Oberwesel and had also the right to levy customs on the Rhine river. The most famous was Friedrich von Schönburg - a much-feared man known as “Marshall Schomberg” - who in the 17th century served as a colonel and as a general under the King of France in France and Portugal and later also for the Prussians and for William Prince of Orange in England.
The Schönburg line died out with the last heir, the son of Friedrich of Schönburg. The castle was burned down in 1689 by French soldiers during the Palatinate wars. It remained in ruins for 200 years until it was acquired by the German-American Rhinelander family who bought the castle from the town of Oberwesel in the late 19th century, and restored it.
The town council of Oberwesel acquired the castle back from the Rhinelander family in 1950. Since 1957 the Hüttl family have been living at the castle on a long-term lease; they operate a hotel and restaurant there.
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.