Castle Keppenbach, Medieval castle ruins in Freiamt, Germany.

Castle Keppenbach is a ruin sitting on a ridge at 455 meters (1,500 feet) above sea level in the Freiamt area. The surviving walls reach about 7.5 meters (25 feet) high and measure 2.3 meters (7.5 feet) thick, clearly showing medieval construction techniques.

Hartmut von Keppenbach appears in 1161 as a Zähringen ministerialis, and the castle itself is first documented in a 1276 fief letter. From 1336 it was a Ganerbenburg shared with the Schnewlin family. After the Keppenbachs turned to robbery, Habsburg forces destroyed it in 1396; they rebuilt it early in the 15th century, and the Peasants' War destroyed it again in 1525.

The castle's purpose was to protect the silver mining in the Brettenbach valley, as the sources state. The name Keppenbach comes from the family Hartmut von Keppenbach, mentioned in 1161 as a ministerialis of the Zähringer. From 1336 the castle was a Ganerbenburg shared with the Schnewlin family. Knight Her Hummel von Keppenbach fell at the Battle of Sempach on 9 July 1386.

The ruin stands on a narrow spur of the Schlossberg above the Sägplatz hamlet in the Reichenbach district of Freiamt. The site has no tower of its own; the free-standing tower 70 metres to the north and 38 metres lower is thought to have served as the bergfried and to have been linked to the outer bailey. The rock base of the castle is registered as a geotope by the state geology office.

The castle has no bergfried of its own. A tower standing 70 metres north and 38 metres below the main castle is thought to have served as its keep, linked to the outer bailey. The castle's rock base is registered as a geotope by the state geology office.