Burg Tölz, Medieval castle ruin in Bad Tölz, Germany.

Burg Tölz is a castle ruin whose remains sit on a high rocky outcrop above the Isar valley, positioned beneath the current parish church of Bad Tölz. Archaeological discoveries revealed masonry sections with arrow slits when the site was excavated during school construction in the 1800s.

Heinrich von Tollenz built the castle around 1180. When the Tölz line died out with Gebhart in 1265, the site passed to the Wittelsbachs, who leased market and castle to Freising in 1300. The great town fire of 1453 destroyed the castle; Duke Albrecht III had already moved to a new residence above the Marktstraße by 1460.

The parish church Mariä Himmelfahrt now occupies the former castle grounds and shapes the character of the place. The church tower may have originated from the castle's medieval keep, linking the two structures together.

Nothing of the castle stands above ground today; the site lies under and around the parish church Mariä Himmelfahrt on the Isar high bank in Bad Tölz. Look for the church tower, which city chronicler Georg Westermayer linked to the castle keep. The late-Gothic cellar vault in Klammergasse, built in the late 15th century, is too young to belong to the medieval castle.

The claim that a late-Gothic cellar vault in today's Klammergasse is the last remnant of the castle is false: the vault dates from the late 15th century, far too young for the high-medieval castle. The cellar was built over by the Metzgerbräu in the 17th century.