Question: Giovanni Battista Buonamente played what for the last emperor to have real power over the Holy Roman Empire?
Sentence (from "German Emperor"): A specifically chosen term, it was used between the 18 January 1871 proclamation of King of Prussia and President of the North German Confederation Wilhelm I as ""Deutscher Kaiser"" and the official abdication of Wilhelm II on 28 November 1918.
Relevant evidence: No