The oldest historical documents of Wasserburg castle dates back to 1185. The aristocrat Dietmar von Wasserburg was the first noted owner of the estate. Until the 13th century wasserburg remained in the possession of the von Wasserburg line the most notable member being Heinrich von Wasserburg who was the brother in law of the famouse minnesinger Ulirch von Lichtenstein. Legend says that von Lichtenstein took a leading role in the liberation of King Lionheart during his Austrian imprisonment. In 1238 the nobleman Otto von Haslau took possession of Wasserburg. A couple of years later the estate change through marriage into the possession of the aristocratic Puchberger line.
In the 14th century the von Toppel family inhabitated Wasserburg but already in 1515 Christoph von Zinzendorf bought Wasserburg and incorporated it into the family’s possession of vast estates throughout the Austrian imperial lands. The Zinzendorfs used Wasserburg as their ancestral home and main family estate for more than 400 years. In 1813 Count Heinrich von Baudissin adopted the crest and the name of the departed Heinrich von Zinzendorf. Count Baudissin-Zinzendorf who originally came from Holstein in Germany introduced the protestant tradition of the christmas tree to Austria, it is said that the Christmas tree of 1827 in Wasserburg was the first of its kind in the Austrian Empire.
1912 Count Baudissin-Zinzendorf sold Wasserburg to Count Heinrich Fuenfkirchen. During the Great War the castle functioned as a recreation home for soldiers from the front. In 1923 Count Carl Hugo Seilern and Aspang bought the estate and it remains until today in the possession of the Seilern-Aspang family.
Today Wasserburg can be rented. There is also a yoga center.
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.