Solavers Castle was originally built as a fortified church probably during the Early Middle Ages.

Frederick VII's death also started the Toggenburg War and a long running dispute over the inheritance of the castle.

[3] Perhaps due to the disputed succession and the local residents' hostility to foreign rulers, the castle was abandoned in the mid 15th century.

Later they sold the territory to Duke Sigismund of Austria, over the objections of the League which opposed the Austrian Habsburgs.

However, in 1487 the communities of Seewis and Fanas agreed to continue holding their major church festivals in Solavers.

A 60 m (200 ft) long curtain wall stretching along the north-west side of the hilltop protected the church.

[3] When the fortified church was converted into a feudal castle, a ring wall was built around the west and southern sides of the hill top along with a tower.