 These early bishops of York acted as diocesan rather than archdiocesan prelates until the time of Ecgbert of York, who received the pallium from Pope Gregory III in 735 and established metropolitan rights in the north.Until the Danish invasion the archbishops of Canterbury occasionally exercised authority, and it was not until the Norman Conquest that the archbishops of York asserted their complete independence.At the time of the Norman invasion York had jurisdiction over Worcester, Lichfield, and Lincoln, as well as the dioceses in the Northern Isles and Scotland.