 Offa is understood to have been buried in Bedford and his Minster Church of St Paul has been identified as a possible site of his grave.The church mentioned by name in the Domesday book was a house of secular canons in the eleventh century, ruled by an abbot in 971, and the church in which Oscytel (or Oskytel), Archbishop of York was buried in 956, indicating that St Paul's was an important minster church from at least the tenth century onwards.From the early ninth century the priests’ mission was frequently interrupted by the invasions of the heathen Danes which continued at intervals until the arrival of the Normans in 1066.