During the
High Middle Ages the
Freiherr von Oberhofen built Balm Castle on a hill above the village. In 1200, a daughter of the family, Ita, married into the von Eschenbach family and gave this family the castle and village. In the 13th century they began a new,
moated castle on the shores of
Lake Thun. One of the last owners of the castle, Walter IV von Eschenbach, was assassinated along with
King Albert I in 1308 by Albert's nephew
John. In 1306 the von Eschenbach family was forced to sell Oberhofen and the castle to the
Habsburgs. The Habsburgs appointed a succession of
vassals to administer the area for them, especially the
Kyburgs who also owned
Thun Castle. Following the Kyburg defeat in the
Burgdorferkrieg of 1383-84 and the decisive Habsburg defeat at the
Battle of Sempach in 1386,
Bern began to expand into the Austrian lands in the
Bernese Oberland. They occupied Oberhofen in 1386 and were finally able to purchase or usurp all the land and rights from every feudal land holder in 1397. In the following year they sold the castle and Oberhofen
Herrschaft to Ludwig von Seftigen, a citizen of Bern. Over the following centuries the town, castle and
herrschaft passed through several Bernese
patrician families. After the male line of the von
Erlach family in Oberhofen died out in 1652, Bern acquired the castle and lands. They created the
bailiwick of Oberhofen and converted Oberhofen Castle into the administrative center for the bailiwick. Following the
1798 French invasion, Oberhofen am Thunersee became part of the
Helvetic Republic Canton of Oberland. After the collapse of the Republic and 1803
Act of Mediation it joined the newly created
Thun District. ==Castle site==