Wasserschloss Seebach, Former water castle in Seebach, Mühlhausen, Germany

Wasserschloss Seebach is a former water castle at Lindenhof 3 in the Seebach district of Mühlhausen/Thuringia. Its present form is a multi-storey stone building with a timber-framed upper storey, rebuilt in the 19th century and between 1911 and 1914. A water-filled moat surrounds the structure.

Built around 1227 by Lutz von Seebach for the Archbishops of Mainz, the castle was pledged in 1307 and passed to the von Bünau family in 1523, then sold for 6,000 guilders to Hans Sittich von Berlepsch. In early May 1525 rebellious peasants and Mühlhausen citizens plundered and destroyed it and imprisoned Berlepsch; after his release the von Berlepsch family rebuilt it and was enfeoffed in 1527.

The bird protection park laid out on the grounds in 1885 and 1886 is the oldest bird conservation facility in Germany. It was run privately until 1908 and has operated as the Staatliche Vogelschutzwarte Seebach since 1936.

The castle stands at Lindenhof 3 in the Seebach district of Mühlhausen, in the Unstrut-Hainich district. The site is a former water castle, so expect ground near the moat to be damp; the bird protection station on the grounds is the oldest in Germany, founded in 1885–1886 and run as a state facility since 1936.

The bird protection park laid out on the grounds in 1885 and 1886 is considered the oldest bird conservation facility in Germany; it was run privately until 1908 and has operated as the Staatliche Vogelschutzwarte Seebach since 1936.