In 847 the bishopric of Bremen was united with Hamburg, but the authority of this archbishopric extended mainly over the districts north and east of the Elbe.The events of the Hundred Days (March-June, 1815) brought him back to France; he resumed his archiepiscopal duties at Lyons and was further named a member of the senate.POSEN (Polish Poznan), a city, archiepiscopal see and fortress of Germany