Balduinseck Castle is located in the valley on the L 203 between the towns of Buch and Mastershausen and is freely accessible. The hilltop castle was built in the 14th century by Elector Baldwin of Luxembourg as a stronghold against the Counts of Sponheim, who resided at Kastellaun Castle. When it was built, Baldwin seems to have been particularly inspired by the French donjon type.
The castle was never destroyed but fell into ruin from the 18th century. Comprehensive renovation was completed in 2014, making the site freely accessible again. The 18-meter-high, four-story walls of the residential tower are still well preserved today. Today, Balduinseck Castle is a special highlight for many hikers.
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.