Meysembourg Castle has a history dating back to the 12th century, but today's castle was built in 1880 in Neo-Renaissance style and is privately owned. The Meysembourg family is first mentioned in the 12th century when Dame de Meysembourg was in the service of Ermesinde, Countess of Luxembourg. Historic references show that Walter de Meysembourg was the propretor in 1176 and Eberhart de Maysembourg in 1296. In 1443, the castle was destroyed by Philip the Good but was rebuilt before 1500. It was again destroyed by Maréchal de Boufflers troops in 1683–84. All that remains of the former castle are the chapel, the moat and part of the outer wall. Custine de Wiltz, the last in line to inherit the property, fled during the French invasion in 1794. Following a public auction in 1798, the castle fell into the hands of the Lords of Fischbach, Cassal and finally Jean-François Reuter of Heddersdorf who occupied the village after expelling its inhabitants.
After buying the property in 1885, the Prince of Arenberg demolished it in 1880 and built a new castle in Neo-Renaissance style. In 1971, the State architect Charles Arendt carried out restoration work. The property now belongs to the Spiegelburg family. The castle is now privately owned and is not open to visitors.
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.