Bohuslan  

Bohuslan is a Swedish province in Götaland, on the northernmost part of the country's west coast. It is bordered by Dalsland to the northeast, Västergotland to the southeast, the Skagerrak arm of the North Sea to the west, and the county of Ostfold, in Norway, to the north. Bohuslän is named after the medieval Norwegian castle of Bohus. Under the name Baahuslen, it was a Norwegian county from the Norwegian conquest of the region from the Geats and subsequent unification of the country in the 870s until the Treaty of Roskilde in 1658, when the union of Denmark-Norway was forced to cede this county, as well as Skaneland to Sweden.

As of 31 December 2016, the number of inhabitants was 299,087, giving a population density of 68 inhabitants per square kilometre. During the 2nd millennium BCE, the Nordic Bronze Age began including rock art such as the examples found throughout Bohuslän. During the Migration Period and the Viking Age the area was part of Viken, and was actually known as two entities: Rånrike in the north and Elfsyssel in the south.