Vingulmark's the old name for the area which today makes up the counties of Østfold, western parts of Akershus (excluding Romerike), and eastern parts of Buskerud (Hurum and Røyken municipalities), and includes the site of Norway's capital, Oslo. According to medieval kings' sagas, it was a Viking Age petty kingdom. Archaeologists have made finds of richly endowed burials in the area around the estuary of the river Glomma, at Onsøy, Rolvsøy and Tune, where the remains of a sh… (More on Vingulmark)