Schauenburg Castle is a ruined hilltop castle located in Oberkirch, Germany, atop a 367m (NN) hill spur overlooking the Rench river valley above the town of Gaisbach, Baden-Württemberg. The castle was built by Duke Berthold II of Zähringen.The well-preserved ruin includes the remains of two towers with living quarters, a gate tower, a rampart, and a shield wall with an attached chapel. The remains of an outer bailey are surrounded by a dry moat and a second shield wall.The castle is now a tourist attraction and includes a small museum in the cellar of the former castle chapel and a restaurant.