[1][2] Christina was the daughter of King Sverre Sigurdsson of Norway and his Swedish queen consort, Margaret.
[4] Her marriage was arranged as a part of reconciliation between the Bagler and Birkebeiner factions during the period of the Civil war era in Norway.
[5] Thea Sofie Loch Naes portrayed a heavily fictionalized Christina (named Kristin) in the 2016 film The Last King.
In Norwegian civil war era it was usual that several royal sons fought against each other over power in Norway.
The background for these conflicts were the unclear Norwegian succession laws, social conditions and the struggle between Church and King.