Balm Castle

The Balm ruins are located near Balm bei Günsberg in Switzerland and represent the remains of a fortified cave dwelling constructed by medieval settlers. The site, first known as “Balb,” derives its name from an ancient Celtic-Romance expression meaning “overhanging rock,” reflecting its setting beneath the Balmfluh cliff in the Jura Mountains.

The castle was built in the mid-11th century, making it one of the oldest fortifications in the region. It served as the stronghold of the free noble family known as the lords of Balm, who are first recorded from the 12th century. Early members included Fridericus von der Hüli and his son Guntram, as well as Burkart von Balm around the year 1200. As the focal point of a small lordship, its domain roughly matched the boundaries of today’s municipality of Balm. Eventually, the original family relocated to a new residence in Altbüron. Following this move, Balm was granted as a fief to a vassal, which spared the site from destruction when Duke Leopold ordered the demolition of Altbüron in 1308 after Rudolf II of Balm was implicated in the murder of King Albert.

Over the 14th century, ownership changed hands several times, passing from the Holy Roman Empire (Reich) to the Counts of Strassberg, and in 1320 to a Solothurn knight named Pantaleon von Gebstrasse. Seven years later, Count Rudolf of Neuenburg-Nidau acquired the castle. After Rudolf fell in battle against the Guglers—a group of mercenary soldiers—his heirs sold Balm in 1374 to the merchant family Peter Schriber from Solothurn, marking the transition from feudal control to private ownership.

In 1411, Arnold Bumann, heir of the Schriber family, sold Balm Castle to the city of Solothurn, which sought to extend its territorial influence in the area. By around 1400, the castle had fallen into considerable disrepair. In 1417, Solothurn leased the property to Hans Sigrist of Naters under the condition that he carry out necessary restorations. However, these repairs were either only partially completed or never fully undertaken. Archaeological evidence indicates the site was occupied until about 1450, but no major maintenance followed, and from the mid-15th century onward, the castle fell into ruin. Local farmers sometimes quarried stone from the remains. The ruins gained renewed attention in 1939 when the Historical Association of the Canton of Solothurn acquired the site and undertook archaeological excavations and preservation efforts over the next two years. In 1969, ownership passed to the canton itself, and the Balm Castle Association was established to safeguard and maintain the historic ruins.