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Båhus Fortress

Bohus Fortress
Kungälv, Sweden
Bohus fästning.jpg
Bohus Fortress
Site information
Controlled by Norway, Denmark–Norway, Sweden
Site history
Built 1308
In use 1308-1783
Materials Granite, brick, wood

Bohus Fortress (also known as Baahus or Båhus, originally: Bagahus) lies along the old NorwegianSwedish border in Kungälv, Bohuslän, Sweden, north east from Hisingen where the Göta river splits into two branches (20 km (12 mi) north of Gothenburg). It commands the surrounding area from a cliff 40 m (130 ft) high, with the river forming a natural moat around it.

The construction of Bohus Fortress (Norwegian: Båhus festning, Swedish: Bohus fästning) began in 1308 under King Haakon V Magnuson, king of Norway from 1299 to 1319. Håkon V also initiated construction of Norwegian fortresses at Akershus and Vardøhus as part of a broader defensive policy. At the time Bohuslän (Båhuslen) was Norwegian territory and served as the main Norwegian defence against Sweden, along the coast as well as the strong point for the Bohuslän region from 1308 to 1658.

According to architect Guthorm Kavli:

By 1310, records show it was constructed, as normal for that period, out of granite and brick, perhaps under the guidance of Count Jacob of Halland. By 1450, it included a continuous surrounding wall, 3 metres thick at the base, with a height which varied from 8.5 to 13.5 metres, varying with the terrain. It was approximately rectangular, with four rectangular corner towers. At the eastern end there was a brick tower, and in the centre of the west side a gate house and drawbridge. Along the inside of the surrounding wall buildings were located which among other things included the 'Kings hall', the castle commander's residence, the chapel, the guardroom, the barracks and the kitchen. The fortress had secure vaulted positions, partly cut into the mountain, and beyond that strong outer-works. At the time Båhus was Norway's strongest fortress. The approaches were very difficult and the area to be defended was small, only 250 x 150 metres, so it did not require a large defensive force.


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