Orio Mastropiero
Encyclopedia
Orio Mastropiero was Doge of Venice
Doge of Venice
The Doge of Venice , often mistranslated Duke was the chief magistrate and leader of the Most Serene Republic of Venice for over a thousand years. Doges of Venice were elected for life by the city-state's aristocracy. Commonly the person selected as Doge was the shrewdest elder in the city...

 from 1178 to 1192, when he abdicated and retired to a monastery.
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