Bohus Fortress
Västra Götalands län
Bohus Fortress, located on a 40-meter high cliff in Kungälv, Sweden, is a medieval fortress with a rich history spanning over 700 years. Originally built starting in 1308 under Norwegian King Haakon V Magnuson, it served as a critical defense point along the old Norwegian–Swedish border. Constructed primarily from granite and brick, the fortress featured thick surrounding walls and multiple towers, including the notable 'Red Tower.' Throughout its history, Bohus Fortress was besieged at least 14 times but was never conquered. It played a significant role during the Northern Seven Years' War, notably with the dramatic 'Bohus Bang' explosion that thwarted a Swedish assault. The fortress was later upgraded to a bastion fortress with Dutch engineering influences, including works by Hans van Steenwinckel and Isaac van Geelkerck. Following the Treaty of Roskilde in 1658, Bohus Fortress became part of Sweden. Despite heavy sieges and damage, the fortress remains a symbol of medieval military architecture and Scandinavian history. Today, it stands as a ruin and a protected cultural heritage site, offering visitors a glimpse into its strategic importance and storied past.
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Tip: The best time to visit Bohus Fortress is during the warmer months when the weather is pleasant and the site is fully accessible. It is recommended to check opening hours and consider purchasing tickets in advance during peak tourist seasons to avoid queues. Guided tours may enhance the experience by providing detailed historical context. Discounts may be available for seniors, students, and groups. Visitors should wear comfortable shoes due to the rugged terrain and uneven surfaces around the fortress ruins.
Interesting facts
- •Bohus Fortress was besieged 14 times but never captured in battle.
- •The 'Bohus Bang' was a massive explosion in 1566 that killed hundreds of attacking Swedish soldiers.
- •The fortress was upgraded by Dutch engineers, including Hans van Steenwinckel, who influenced its Renaissance-style bastion design.
- •The fortress is located on a cliff 40 meters high, with the Göta river forming a natural moat around it.
- •After the Treaty of Roskilde in 1658, Bohus Fortress was ceded from Norway to Sweden.
History
Bohus Fortress was constructed beginning in 1308 under King Haakon V of Norway as a strategic defense along the Norwegian–Swedish border.
Over the centuries, it was expanded and reinforced, especially after damage sustained during the Northern Seven Years' War in the 1560s.
The fortress was never captured despite numerous sieges, including a major attack in 1678.
In 1658, the Treaty of Roskilde transferred Bohus Fortress from Norway to Sweden.
Subsequent repairs were slow and limited due to financial constraints.
The fortress's history reflects the shifting political and military landscape of Scandinavia throughout the medieval and early modern periods.
Place Guide
Kings' Hall and Commander's Residence14th century
Located inside the fortress walls, this area housed the King's hall and the residence of the castle commander, serving as the administrative center during the fortress's active use.
Red TowerMedieval period
A prominent brick tower on the northeast of the fortress, notable for being the site of the 'Bohus Bang' explosion in 1566 during a Swedish assault.
Bastion Fortifications1593-1604
Upgraded fortifications constructed between 1593 and 1604, designed by Dutch architects including Hans van Steenwinckel, featuring bastions and outer walls to improve defense against artillery.
South Façade Corner Towers and Ring Wall1651-1652
Constructed under supervision of Dutch engineer Isaac van Geelkerck in 1651-1652, these additions included two corner towers and a new ring wall around the arsenal building to enhance protection.
Contact
Phone: 070-540 84 84
