As a thank-offering he dedicated his daughter ZElfled to the Church, and founded the monastery of Whitby.
In 664 at the synod of Whitby, Oswio accepted the usages of the Roman Church, which led to the departure of Colman and the appointment of Wilfrid as bishop of York.
From Hartlepool Hilda moved to Whitby, where in 657 she founded the famous double monastery which in the time of the first abbess included among its members five future bishops, Bosa, 'Etta, Oftfor, John and Wilfrid II.
In 655 after the battle of Winwa d Oswio entrusted his daughter IElfled to Hilda, with whom she went to Whitby.
At the synod of Whitby in 664 Hilda sided with Colman and Cedd against Wilfrid.