The Hochwarthaus crowns the highest point of Reichenau, Baden-Württemberg, Germany, about 40 metres above Lake Constance. Privy councillor Eugen von Seyfried built it in 1839 as a picturesque tea house, and it now serves as a ceramics studio and tea room again. A stone cross and a large tree stand in front of the building. Visitors take in the view over the Untersee, the vegetable fields and the Rhine.