Nicholas Arnesson was a Norwegian bishop and nobleman during the Norwegian civil war era. He was a leader in the opposition against King Sverre of Norway and founder of the Bagler party. He is a chief antagonist in Sverris saga. and also appeared in The Pretenders, an historic drama written by Henrik Ibsen in 1863.
- Occupation
- Catholic priest, Catholic bishop
- Position held
- bishop, Roman Catholic Bishop of Oslo
- Citizenship
- Norway
- Born
- 1150
- Died
- November 7, 1225, May 9, 1225
