Schülzburg, Castle ruin near Anhausen, Germany.

Schülzburg is a ruined hilltop castle at 616 m above sea level southeast of Anhausen, a district of Hayingen. Substantial remains of the medieval castle survive, especially the palas, and east of it stand the ruins of a Renaissance palace built in 1605.

In 1329 the knight Ernst Walter von Stadion acquired the site in an exchange with Salem Abbey and had the present castle built shortly afterwards. In 1362 Eitel von Stadion held it as a fief from Duke Rudolf III of Austria; by 1374 the lords of Freyberg renounced it in favour of Counts Eberhard II and Ulrich IV of Württemberg. From 1452 it passed as a pledge, later a Württemberg fief, to the lords of Speth, and in 1605 Hans Reinhard II von Speth built the "new" palace in front of the medieval castle. A fire on 14 February 1884 destroyed the whole complex, and it was never rebuilt.

The name Schülzburg comes from the lords of Schülzburg, who held the castle as a Württemberg fief from 1452; the medieval castle and the Renaissance palace built in front of it in 1605 by Hans Reinhard II von Speth form a double complex. Visitors today see the ruins of both, the Palas of the hilltop castle and the shell of the Renaissance palace to its east.

The ruins are accessible with information panels that explain the medieval architecture and layout. Wear sturdy shoes because the ground is steep and rocky in places.

The 1605 "new" castle was built by Hans Reinhard II von Speth directly in front of the medieval castle, so two building phases stand side by side: the medieval keep ruins and the Renaissance palace ruins east of them. Both were gutted in the fire of 14 February 1884 and left unrestored.