Traventhal House (German: Schloss Traventhal) in the municipality of Traventhal near Bad Segeberg in the southern part of the German state of Schleswig-Holstein was the summer residence of the dukes of Schleswig-Holstein-Sonderburg-Plön. In the 18th century the house was renowned for its Baroque garden, which was the largest and most significant of its kind in the duchies.[1] On the dissolution of the Duchy of Plön in 1761 the brief heyday of the stately home came to an end. The original house was demolished at the end of the 19th century and replaced by a new building typical of the time in a historicist architecture style.