Genantic Kingdom The angles and theh saxons invaded bristian and the assimilated the native britos Most of the ango-saxons were converted to Christianity in the seventh century the most powerful germanic tribe was the franks but the real power lay with the "Mayors of the palace" who were royol officials and the nobles themselves Third version finished in 537, the cathedral of hagia sophia, justinian's cathedreal, was later a mosque and now is a museum. Using knowledge of the geometry of curves. It has a dome supported by arches high in the air that reamined for a model for both church- vuilders and mosque- builders for more than a thousand.