During his minority the papacy, the German nobles, and the high ecclesiastics greatly increased their power at the expense of the imperial authority. In 1062, Archbishop Anno of Cologne abducted Henry and assumed the regency, which had been held by Henry's mother, Agnes; Anno enriched his see from the royal lands and revenues. He allowed Archbishop Adalbert of Hamburg-Bremen to share the authority and plunder, and Adalbert soon became sole regent. Henry attained his majority in 1065, but Adalbert retained the regency until jealous nobles persuaded Henry to dismiss (1066) him.
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