Giovanni Battista Costanzo (died 1617) was a Roman Catholic prelate who served as Archbishop of Cosenza (1591–1617).
[1][2][3] On 5 April 1591, Giovanni Battista Costanzo was appointed during the papacy of Pope Gregory XIV as Archbishop of Cosenza.
[1] On 21 April 1591, he was consecrated bishop by Giulio Antonio Santorio, Cardinal-Priest of San Bartolomeo all'Isola, with Leonard Abel, Titular Bishop of Sidon and Giovanni Battista Santorio, Bishop of Tricarico serving as co-consecrators.
[1] While bishop, he was the principal consecrator of Francesco Monaco, Bishop of Martirano (1592); and Decio Caracciolo Rosso, Archbishop of Bari (1606).
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