As the archbishop in this period usually also held the Bishopric of Münster (and often the Bishopric of Liège), he was one of the most important princes of northwestern Germany.
Kuna peapiiskop valdas sel perioodil tavaliselt ka Münsteri piiskopkonda (ja sageli ka Liège'i piiskopkonda), oli ta üks kõige tähtsamaid vürste Loode-Saksamaal.