The Merchant of Venice' The term 'Doge of Venice' is a reference to the main antagonist in William Shakespeare's play 'The Merchant of Venice'. The Doge was the elected chief magistrate and leader of the Republic of Venice, and in the play, he is portrayed as a powerful and influential figure. The Doge is responsible for the trial of Antonio, the play's protagonist, and his decision to take a pound of flesh from Antonio as payment for a loan.