The Consiglio Maggiore – or the Great Council – was the highest authority of the Venetian Republic. It was not, however, an elected body. It was the entire electorate.
The doge was the elected head of the Venetian Republic. He was elected for life by an arcane process that also included drawing lots.
Marin Falier was a doge of Venice, but he was beheaded on April 17th, 1355, for having orchestrated a coup against the state he led