The Kastelburg is a ruined castle above Waldkirch in the district Emmendingen in Baden-Württemberg.

It stands on a hill about 100 meters (330 feet) above the center of Waldkirch in Breisgau.

The Schwarzenbergs died out already in 1345 and the castle was sold to Martin Malterer from Freiburg who fell in 1386 in the Battle of Sempach.

In recent years attempts have been made to conserve the edificial structure of the ruin that is standing romantically above the historic center of Waldkirch (Action Kastelburg).

•Alfons Zettler, Thomas Zotz: Die Burgen im mittelalterlichen Breisgau, I. Nördlicher Teil: Halbband L-Z.