Arne Odd Johnsen

Arne Odd Johnsen (3 December 1909 – 9 July 1985) was a Norwegian medieval and economic historian.

Early career He was born in Asker as the son of historian Oscar Albert Johnsen (1876–1954) and Anna Evie Tollefsen (1877–1944). He finished his secondary education in 1928, enrolled in philology at the University of Oslo and graduated in 1936 with the mag.art. degree. Between 1937 and 1939 he studied medieval history at École des Chartes, Sorbonne and Collège de France. He was then a research fellow at the University of Oslo for five years. In 1945 he published his thesis Studier vedrørende kardinal Nicolaus Brekespears legasjon til Norden, about Cardinal Nicolas Breakspear, later known as Pope Adrian IV. The thesis earned him the dr.philos. degree in 1946. He married interior decorator Birgitte Christine Paus (1915–1992) in 1952. He died in July 1985 in Oslo.