 Unwan and Benno, Bishop of Oldenburg, began anew the Christianisation of the Obodrites of Wagria following decades of mild rebellion.The work of the archbishop was largely successful, save for the violent uprising precipitated by Benno's ecclesiastical land claims.In 1021, the Obodrites accepted the overlordship of the archdiocese as opposed to the Duke of Saxony and agreed to pay tithes.