Eleanora Luisa Gonzaga ( 13 November 1686 â `` 16 March 1741 ) was the Duchess of Rovere and Montefeltro as the wife of Francesco Maria de ' Medici . Eleanora Luisa Gonzaga ( 13 November 1686 -- 16 March 1741 ) was the Duchess of Rovere and Montefeltro as the wife of Francesco Maria de ' Medici .