Halfdan the Black was a king of Vestfold. He belonged to the House of Yngling and was the father of Harald Fairhair, the first king of a unified Norway.
Halvdan Svartes saga. Gerhard Munthe, Heimskringla, 1899
Halvdanshaugen at Hadeland Folkemuseum, one of the several burial sites of Halfdan the Black
Vestfold is a county and a current electoral district in Eastern Norway. Located on the western shore of the Oslofjord, it borders Buskerud and Telemark counties. The county administration is located in Tønsberg, Norway's oldest city, and the largest city is Sandefjord. With the exception of the city-county of Oslo, Vestfold is the smallest county in Norway by area. Vestfold was until 2019 the only county in which all municipalities had declared Bokmål to be their sole official written form of the Norwegian language.
Norway's largest preserved Viking ship, Gokstad ship, was discovered at Gokstad Mound, Sandefjord.
Istrehågan, ancient burial ground which dates to the Roman Iron Age, 1500-500 BC
Halfdan the Black, 9th century king of Vestfold. His brother was long believed to be buried at the Gokstad Mound.
Southern Actor, whale-catcher turned museum ship