Konghelle

Konghelle, or Kungahälla, stood on the Nordre River west of present-day Kungälv. As Norway's southernmost town, it combined trade and crafts with an exposed position close to the Swedish frontier. Boats carried people and goods between the coast and inland country. Its religious landscape included Kastala monastery, whose estate produce was collected at the associated farm, Kastellegården.

The town gradually lost political and commercial importance as Marstrand developed and royal attention shifted toward Bohus fortress. Swedish troops burned Konghelle in 1612. Christian IV ordered a replacement town below Bohus in 1613, while the old site became agricultural land. The successor settlement passed to Sweden with Bohuslän under the Treaty of Roskilde in 1658. At the original site, Kastellegården continued as a farm and became a state-owned tenancy in 1821. Konghelle's later history thus includes both a relocated town and the rural reuse of its former urban ground.