Marriage and the Conversion of Northumbria
The marriage of Aethelburh to Edwin in 625 was, in the account preserved by the tradition, as much a missionary venture as a dynastic one. Edwin agreed that his Christian bride should keep her faith and her clergy, and undertook to weigh the Christian religion for himself. Paulinus accompanied her northward, having been consecrated bishop so that he might both strengthen the queen and preach among the Northumbrians.
By tradition Edwin's eventual conversion followed upon military success and the birth of the couple's daughter Eanflaed, who was among the first to be baptized in Northumbria. Edwin was baptized at York, where a church was raised, and many of his people followed him. Aethelburh's role in this turning of the northern kingdom toward Christianity is the foundation of her later veneration.