Sigeberht of East Anglia was a 7th-century king and saint who played a significant role in the Christianization of his kingdom. After spending years in exile in Gaul, where he received a Christian education and baptism, he returned to rule East Anglia alongside a co-regent. He is noted as the first English monarch to be educated as a Christian before ascending the throne and the first to renounce his royal status to pursue a monastic life.