William, Archbishop of Mainz

William, Wilhelm ,the son of emperor Otto I the Great and a Slav mother, acceeded as archbishop? of Mainz in 954/5 and died in 968.

The Mainz archbishops had precedent over newly established Prague in Bohemia. Moravia, Bohemia stood the previous 100 years under Regensburg?.

The archbishops of Mainz held one of the most important positions of [Kurfuersten electors]? in the Holy Roman Empire.