After the Bremen Cathedral chapter, overlooking the three enfranchised Hamburg capitulars, had elected Valdemar of Denmark, the deposed Bishop of Schleswig, archbishop in 1207, Bremen's cathedral dean Burchard of Stumpenhusen, who had opposed this election, fled to Hamburg, then under Danish influence. King Valdemar II of Denmark, in enmity with his father's cousin Archbishop Valdemar, gained the Hamburg chapter to elect Burchard as anti-archbishop in early 1208. Lacking papal support, King Valdemar II himself invested him as Archbishop Burchard I, however, only accepted in North Elbia.