Alliances were strengthened between the Christian kingdoms of Kent , Northumbria and East Anglia .
During Sigeberht 's reign the cause of Christianity in East Anglia was advanced greatly , even though his co-ruler Ecgric probably remained a pagan .
Alliances were strengthened between the Christianity kingdoms of Kent , Northumbria and East Anglia .
During Sigeberht 's reign the cause of Christianity in East Anglia was advanced greatly , even though his co-ruler Ecgric probably remained a pagan .