Rümligen Castle, Medieval château in Rümligen, Switzerland

Rümligen Castle is a medieval fortification that rises on a high stone terrace above Thurnen village, composed of interconnected stone buildings. A tall rectangular tower dominates the complex, extending seven stories high and integrated with residential structures that form the main body of the castle.

The castle's oldest element, the seven-storey keep, dates from the late 11th century, when the Freiherren von Rümligen held land between the Gürbe and Sense; the family first appears in records in 1076 with Lütold von Rümligen's founding of Rüeggisberg Priory. In 1388 the lordship came under Bernese control, and in 1515 it passed to Burkhard Schütz. Samuel Frisching bought it in 1684, and around 1709–1710 his son Samuel Frisching II rebuilt the medieval core into a Baroque castle, giving it its present exterior.

The castle is a class A Swiss cultural property of national significance, but it is privately owned and not open to the public. Its name comes from the Freiherren von Rümligen, first recorded in 1076 when Lütold von Rümligen founded Rüeggisberg Priory. The estate stayed with the Frisching family until Alette Sophie Rosine Frisching married Friedrich von Wattenwyl in 1838.

The castle, estate and park are private property and not open to the public; the new owner, who bought the complex at the end of 2020, intends to keep using it privately. It stands on the eastern slope of the Längenberg above the upper Gürbetal, in the municipality of Riggisberg. The grounds can only be viewed from outside, so plan the approach as a walk past the site rather than a visit.

The northern tower contains stones and structural elements from the Early Middle Ages, with some walls possibly originating from Roman times. This layering in the foundations reveals that the site held strategic value long before the castle's formal construction began.