Sigurd Markusfostre

Sigurd Sigurdsson Markusfostre (ca. 1155 – 29 September 1163) was a pretender and rival king during the Civil war era in Norway.

Background Sigurd Sigurdsson was reportedly a bastard son of King Sigurd II of Norway. He must have been born some time before 1155, when his father was killed in a battle with his half-brother King Inge I of Norway. Sigurd was fostered by Markus of Skog apparently in Hedmark (in the area of the present-day Ringsaker Municipality), due to which his nickname was Markusfostered.

Historic context The Civil war era in Norway extended over a 110-year period. It started with the death of King Sigurd I of Norway in 1130 and ended with the death of Duke Skule Baardsson in 1240. During this period there were several interlocked conflicts of varying scale and intensity. The background for these conflicts were the unclear Norwegian succession laws, social conditions and the struggle between Church and King. There were then two main parties, firstly known by varying names or no names at all, but finally condensed into parties of Bagler and Birkebeiner. The rallying point regularly was a royal son, who was set up as the head figure of the party in question, to oppose the rule of king from the contesting party.