Oswald's head was eventually interred in Durham Cathedral - his other three heads made their way to different places in Europe! Poor Oswald's other arm is said to have eventually made its way to Peterborough Cathedral.
So the cult of St Oswald was established.
Bardney Abbey was one of the first abbeys built along the River Witham on land granted by Oswald, it was endowed by Osthryth and her husband Aethelred. After her murder, Osthryth would later be buried there herself.