Otbert of Liège was bishop of Liège at the end of the eleventh century (in office 1091–1119). He was a major figure in the financing of the First Crusade

First Crusade

The First Crusade was a military expedition by Western Christianity to regain the Holy Lands taken in the Muslim conquest of the Levant, ultimately resulting in the recapture of Jerusalem...

, 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

Godfrey of Bouillon

Godfrey of Bouillon was a medieval Frankish knight who was one of the leaders of the First Crusade from 1096 until his death. He was the Lord of Bouillon, from which he took his byname, from 1076 and the Duke of Lower Lorraine from 1087...

 as a pledge, for a sum of 1300 marks. He also bought the château de Couvin from Baldwin II, Count of Hainaut

Baldwin II, Count of Hainaut

Baldwin II of Mons was count of Hainaut from 1071 to his death. He was the younger son of Baldwin VI, Count of Flanders and Richilde, Countess of Mons and Hainaut.-History:...

. At the same time he prevailed in a conflict over the comté de Brugeron, with Godfrey I of Leuven

Godfrey I of Leuven

Godfrey I , called the Bearded, the Courageous, or the Great, was the landgrave of Brabant, and count of Brussels and Leuven from 1095 to his death and duke of Lower Lorraine from 1106 to 1129...

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