- 1212), also Dietrich II of Are, was bishop and lord of Utrecht in the thirteenth century.
He was constantly embroiled with William I, Count of Holland, and each in turn was the prisoner of the other.
He joined Louis II, Count of Loon, the son-in-law of William, in an attempt to dispossess him, but without success; for they were driven to take refuge under the walls of Utrecht.
He contrived, however, to take Dordrecht, and burn and pillage it, but in the end he was obliged to give up his schemes.
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