[1][2][3][4][5][6] Ercole Visconti was born in Milan, Italy in 1646 and ordained a priest in the .
[2] On 18 July 1678, he was appointed during the papacy of Pope Innocent XI as Titular Archbishop of Tamiathis.
[1][2] On 31 July 1678, he was consecrated bishop by Carlo Pio di Savoia, Cardinal-Priest of San Crisogono, and Egidio Colonna, Titular Patriarch of Jerusalem, and Francesco Casati, Titular Archbishop of Trapezus, serving as co-consecrators.
[2] On 15 November 1678, he was appointed during the papacy of Pope Innocent XI as Apostolic Nuncio to Florence; he resigned on 13 October 1680.
[2] On 12 October 1680, he was appointed during the papacy of Pope Innocent XI as Apostolic Nuncio to Germany; he resigned in July 1687.