Otbert of Liège

{{Use dmy dates|date=December 2021}}

Otbert of Liège (died 1119) was bishop of Liège at the end of the eleventh century (in office 1091–1119).[http://www.newadvent.org/cathen/09236a.htm Catholic Encyclopedia: Liege] He was a major figure in the financing of the First Crusade, and an expansionist.

He was a close supporter of Emperor Henry IV, accompanying him on campaigns.

In 1096 he took the whole Duchy of Godfrey of Bouillon as a pledge,[https://www.fotw.info/flags/be-wlxbo.html], [http://www.castles.org/castles/Europe/Western_Europe/Belgium/bouillon.htm] {{Webarchive|url=https://web.archive.org/web/20121017060820/http://www.castles.org/castles/Europe/Western_Europe/Belgium/bouillon.htm |date=17 October 2012 }}; Steven Runciman, A History of the Crusades I, p. 146. for a sum of 1300 marks. He also bought the château de Couvin from Baldwin II, Count of Hainaut. At the same time he prevailed in a conflict over the comté de Brugeron, with Godfrey I of Leuven[http://perso.infonie.be/liege06/05cinq00.htm#5/3], in French.