Bohusskaya church is located along the old Norwegian-Swedish border, to the north-east of Hisingen where the Göta river splits into two branches (20 kilometers north of Gothenburg). Fortress towers 40 meters above sea level, the river forms a natural moat around it.

Bohus Fortress Construction began in 1308 when King Magnus Hakone V, ruler of Norway in the period from 1299 to 1319. Hakon V also initiated the construction of the Akershus Fortress and Vardohus as part of a broader defense policy. At the time, the territory on which the Bohus Fortress, was part of Norway, and it served as the main stronghold of the Norwegian defense against the Swedish coast.

Written documents in 1310 show that the fortress was built of granite and brick, which was typical of the era, possibly under the leadership of Count James Halland. By 1450, it includes a continuous surrounding wall 3 meters thick at the base and its height varied from 8, 5 and 13, 5 meters depending on the terrain. It was a rectangular building with four corner towers. The eastern part has brick tower, and in the center of the west side - the gate and drawbridge. Along the inner side of the surrounding walls were located various buildings, including the Royal Hall, the chapel, guardroom, barracks and a kitchen. While Bohus Fortress was the most powerful fortress of the region. Throughout its history the fortress several times been subjected to siege, however, he was never captured.

At the end of the 18th century, it was decided that the castle should be destroyed, as no longer used. Analysis of structures lasted for 2 months until the end of the money allocated to it. Residents of the nearby town of Kungälv used the land for the construction of stone houses, however, much of the fortress remains intact. The fortress is now a museum and is open to tourists in the summer.