Adeodato Giovanni Piazza, O.C.D. (30 September 1884 - 30 November 1957) was an Italian Cardinal of the Roman Catholic Church, Patriarch of Venice, and a member of the Roman Curia in Vatican City. Adeodato Giovanni Piazza was born in Vigo di Cadore, a small town of the Veneto, and was ordained a priest of the Order of Discalced Carmelites in 1908. In 1930 he was ordained a bishop and appointed as Archbishop of Benevento, Italy. In 1949 his title was changed by Pius XII to Cardinal-Bishop of Sabina e Poggio Mirteto. Adeodato Giovanni Cardinal Piazza died in Rome on 30 November 1957.