Adaldagus archbishop of Hamburg and Bremen, lived during the reigns of the three emperors Otho (the last of whom died 1002), and enjoyed great influence at court, where he held the office of chancellor. After the victory which Otho I gained over the Danes, he established three episcopal sees in Jutland, viz., Sleswick, Ripen, and Arhusen. He baptized Harold, king of Denmark, and sent missionaries among the northern nations. — Mosheim, Ch. Hist. cent. 10, pt. 1, ch. 1, § 7.