Valdemar Knudsen (also
Waldemar, born in 1158; died 18 July 1236 in
Cîteaux) was a Danish clergyman and statesman. Valdemar was
Bishop of Schleswig from 1188 to 1208, officiated as
Steward of the
Duchy of Schleswig between 1184 and 1187, and served as
Prince-Archbishop of Bremen from 1192 to 1194 and again between 1206 and 1217. He held the latter office on the grounds of the archdiocesan capitular election as archbishop elect and of the royal investiture with the princely regalia, but lacked the papal confirmation.