Oltigen Castle (Burg Oltigen): A Medieval Hilltop Fortress in Switzerland
Site at a Glance
- Rating
- 4.7
- Popularity
- Very Low
- Country
- Switzerland
- Primary era
- Modern
- Eras represented
- Modern
- Civilizations
- Swiss
- Site type
- Military
- Remains
- Castle
On this page7 sections
History
Oltigen Castle, also known as Burg Oltigen, was a medieval hilltop fortress in Switzerland, built above a crossing of the Aare near its confluence with the Saane. First mentioned in 1006, it gained its greatest influence between 1075 and 1125 during the Investiture Controversy, a conflict between the papacy and secular rulers over the appointment of bishops and other church officials. The struggle also affected control of Alpine routes and territories, giving Oltigen a strategic role.
The Lords of Oltigen
During this period, the Lords of Oltigen held the title of count and temporarily extended their authority over the Bishopric of Lausanne, an ecclesiastical diocese that also possessed territorial power. Among the family were Kuno I, Count of Oltigen and son-in-law of Count Giselbert of Luxembourg, Kuno II, Count of Oltigen, and Burkhard, also called Bukko, Kuno II’s brother.
Burkhard served as Bishop of Lausanne from 1056 to 1089. After travelling to Canossa in 1077, he became Imperial Chancellor for Italy. Johann III of Bubenberg later served as a Kyburgian bailiff at Oltigen from 1346 to 1348. A bailiff was an official who governed territory on behalf of a higher lord or state.
Decline and Destruction
The settlement of the Investiture Controversy in 1122 ended Oltigen’s strategic importance. Around 1400, however, the Lordship of Oltigen still covered large parts of the present municipality of Wohlen, including Oberdettigen, Unterdettigen, Innerberg, Uettligen, Möriswil, and Säriswil. It also included substantial areas of Seedorf, Meikirch, and Radelfingen.
In May 1410, a peasant uprising destroyed the castle, and Hugo of Mömpelgard, its last count, was murdered. Bern then acquired the Lordship of Oltigen and administered it as a land bailiwick, an administrative district governed by a bailiff, until 1483. The territory was then divided between the bailiwicks of Aarberg and Laupen.
The remaining ruins were dismantled in 1850 and reused as building material. This left Oltigen as an abandoned castle site rather than a standing ruin.
Remains
Castle Site and Rock Ridge
Castle Position
Oltigen Castle stood on a rocky ledge above the Runtigenflueh in the present municipality of Radelfingen, in the canton of Bern. The ledge was approximately 90 metres above the bank of the Aare and positioned below the river’s confluence with the Saane. The fortress secured a crossing of the Aare, whose waters in this area are now impounded by the Niederried reservoir. The site survives as an abandoned castle location, since the remaining ruins were removed in 1850.
Güggelisloch Observation Post
During military active service in 1914–1918, soldiers dug a cave through the rock ridge below the castle hill. The cave served as an observation post and is known as Güggelisloch.

