Giulio Piazza (1663–1726) was a Roman Catholic cardinal.
On 22 Dec 1697, he was consecrated bishop by Gasparo Carpegna, Cardinal-Priest of Santa Maria in Trastevere, with Gregorio Giuseppe Gaetani de Aragonia, Titular Patriarch of Alexandria, and Antonio Spinelli, Bishop of Melfi e Rapolla, serving as co-consecrators.
[1][2] and the principal co-consecrator of:
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