Bergenhus fortress is a fortress located in Bergen, Norway. Located at the entrance of Bergen harbour, the castle is one of the oldest and best preserved stone fortifications in Norway.

Bergen, historically Bjørgvin, is a city and municipality in Vestland county on the west coast of Norway. As of 2022, its population was roughly 289,330. Bergen is the second-largest city in Norway after national capital Oslo. The municipality covers 465 square kilometres (180 sq mi) and is located on the peninsula of Bergenshalvøyen. The city centre and northern neighbourhoods are on Byfjorden, 'the city fjord'. The city is surrounded by mountains, causing Bergen to be called the "city of seven mountains". Many of the extra-municipal suburbs are on islands. Bergen is the administrative centre of Vestland county. The city consists of eight boroughs: Arna, Bergenhus, Fana, Fyllingsdalen, Laksevåg, Ytrebygda, Årstad, and Åsane.