Giulio Marzi (11 September 1647 – February 1718) was a Roman Catholic prelate who served as Auxiliary Bishop of Ostia-Velletri (1693–1718) and Titular Bishop of Heliopolis in Augustamnica (1693–1718).
[1][2][3][4][5] Marzi was born in Tivoli, Italy on 11 September 1647.
[2] On 22 December 1693, he was appointed during the papacy of Pope Innocent XII as Auxiliary Bishop of Ostia-Velletri and Titular Bishop of Heliopolis in Augustamnica.
[1][2] On 27 December 1693, he was consecrated bishop by Galeazzo Marescotti, Cardinal-Priest of Santi Quirico e Giulitta, with Filippo Tani, Bishop of Città Ducale, and Giovanni Battista Visconti Aicardi, Bishop of Novara, serving as co-consecrators.
[2] He served as Auxiliary Bishop of Ostia-Velletri until his death in February 1718.