In 1175 the Freiherr von Weissenburg was first mentioned as a land holder and vassal of Duke Berthold IV of Zähringen. Whether they had a castle at this time is not recorded. When he assumed the title in 1259, Rudolf III of Weissenburg expanded and repaired Weissenburg Castle to its full size. Beginning in the 13th century, the Weissenburgs began to expand their Herrschaft. Around 1250 they added Wimmis to their territory, followed by Weissenau Castle in Unterseen and the villages of Rothenfluh and Balm a few years later. However, Rudolf III sought closer relations with the Habsburgs which made an enemy of the nearby town of Bern. In 1288 he lost a battle at Wimmis against Bern and the village was plundered. Ten years later he quarreled with the Habsburgs and the Counts of Neu-Kyburg and lost control over the Rothenfluh and Weissenau Castles. Then, in 1303, he fought Bern again, this time protecting Wimmis.
Rudolf's son, Johann the Elder, was able to continue expanding the family holdings, adding part of the Hasli valley, Oberhofen Castle and Unspunnen Castle. However, in 1334 he suffered a decisive defeat against Bern and was forced to acknowledge Bern as overlord over the castle and Herrschaft. When his son Johann the Younger died in 1368, the Weissenburg line died out and their estates were inherited by the Lords of Brandis. In the mid-15th century the Lords of Brandis sold all their land holdings in the Bernese Oberland including Weissenburg Castle to Bern. Under Bernese rule, Wimmis Castle became the administrative center of the Niedersimmental and Weissenburg was abandoned. Over the following centuries the castle walls were demolished to provide construction material for houses in the village.
The castle is located on a steep hill west of Weissenburg village near the confluence of the Bunsch stream and the Simme river. The castle is protected on three sides by the steep hill, while the gentler west side is guarded by a still visible ditch. Above the ditch portions of a round tower are still visible. The massive south wall and gate are still standing. East of the castle, the foundations of several small houses of the medieval town can be seen.
References:The Jan Hus Memorial stands at one end of Old Town Square. The huge monument depicts victorious Hussite warriors and Protestants who were forced into exile 200 years after Hus, and a young mother who symbolises national rebirth. The monument was so large that the sculptor designed and built his own villa and studio where the work could be carried out. It was unveiled in 1915 to commemorate the 500th anniversary of Jan Hus' martyrdom. The memorial was designed by Ladislav Šaloun and paid for solely by public donations.
Born in 1369, Hus became an influential religious thinker, philosopher, and reformer in Prague. He was a key predecessor to the Protestant movement of the sixteenth century. In his works he criticized religious moral decay of the Catholic Church. Accordingly, the Czech patriot Hus believed that mass should be given in the vernacular, or local language, rather than in Latin. He was inspired by the teachings of John Wycliffe.