Brenz Castle is Renaissance castle located in the Brenz an der Brenz borough of Sontheim in Heidenheim district of Baden-Württemberg in Germany. The current castle was built in 1672 and rests on the remains of an earlier castle destroyed during the Thirty Years' War. Within the castle is a small Community Heritage Museum that is open on Sundays, Holidays or by appointment and hosts several concerts throughout the year.