Hornborg

Hornborg commanded a sheltered waterway on the coast of northern Bohuslän. Its castle occupied a height within bowshot of the channel, and the surrounding district had an old assembly place beneath the rock. Weapons, coins and tools recovered from the site point to the fortress's importance between the mid-fifteenth and early sixteenth centuries. The finds include cannonballs, arrowheads and a war hammer, as well as agricultural implements.

In 1455 the Swedish king Karl Knutsson Bonde strengthened the stronghold while pursuing his claim to the Norwegian crown. The harbour offered a possible outlet for trade with countries such as England and the Netherlands if the mouth of the Göta River was closed. After Bohuslän passed from Norway to Sweden in 1658, the castle lost its strategic importance.