The first king of the East Angles of whom more than a name is known was Rædwald, described by Bede as 'the son of Tytil, whose father was Wuffa', who reigned from about 599 until approximately 624. According to Bede, he was converted to Christianity at the court of his overlord Æthelberht of Kent in about 604. Later in his reign he was powerful enough to hold "imperium" over several Anglo-Saxon kingdoms. In 616, he defeated Æthelfrith of Northumbria and installed the exiled Edwin as the new king. He is thought to have been given a ship burial and interred amongst a magnificent array of personal treasures and symbols of regal power that were discovered under Mound 1 at Sutton Hoo, in Suffolk. His son Eorpwald succeeded him and reigned briefly before he was killed soon after his baptism, by a heathen named Ricberht, after which the East Angles reverted to paganism. Ricberht was replaced by Sigeberht, whose Christian education ensured that Christianity was reestablished. During Sigeberht's joint reign with Ecgric, the East Anglian see at Dommoc was established.