Wülflingen Castle, Heritage castle in Wülflingen district, Winterthur, Switzerland

Wülflingen Castle is a castle built in 1644 by Hans Hartmann Escher vom Luchs at the eastern edge of Wülflingen, now part of Winterthur. It consists of a main building with a northern annex added in 1730, a washhouse and barns. The Gottfried Keller Foundation owns the furnishings of the court room, the gentlemen's room and the upper dining room.

The castle was built in 1644 during a period when Winterthur was developing as a regional center. The structure remains a testament to that era and its construction methods.

The name Wülflingen comes from the Herrschaft Wülflingen-Buch, the lordship held by Hans Hartmann Escher vom Luchs, who built the castle in 1644. From 1832 David Sulzer ran a wine tavern in the building, and a restaurant has operated on the site since then. The Gottfried Keller Foundation owns the furnishings of the Gerichtsstube, Herrenstube and Obere Gaststube, and its collection of over 8,500 works is loaned to around 110 Swiss museums and locations.

Wülflingen Castle stands at the eastern edge of Wülflingen, in the Weinberg quarter of Winterthur, and is served by the city's bus and trolleybus network. The restaurant occupies the historic rooms, so non-diners can view the exterior, the washhouse and the barns. The Gottfried Keller Foundation owns the furnishings of the court room, the Herrenstube and the upper guest room.

The Gottfried Keller Foundation, which owns the panelling of the Gerichtsstube, Herrenstube and Obere Gaststube, keeps part of its collection of over 8,500 paintings, sculptures and objects in around 110 Swiss museums and locations, including the castle interior. In 1906 a Zurich firm bought the castle for speculation and planned to sell off parts of the interior; the committee founded that year and the cooperative bought it back for 85,000 francs, with 35,000 from the foundation.