Wikipedia
Bjølsen
Bjølsen is a neighbourhood in the Sagene borough in central-northern Oslo, Norway. Originally a farm in the former Aker municipality, it was incorporated into Christiania (now Oslo) in 1878.
It has been sawmill and mill operation as far back as the 17th century. Later came the textile industry to Bjølsen, and also a granite quarry.
After most of Bjølsen was incorporated in Christiania (Oslo) in 1878 and much of the farm land was purchased by the municipality it became regulated park, Bjølsen park, which is still a green lung in the area. It adjoins a colonial garden where the children's television series Portveien 2 was recorded.