Antonio Giustiniani" (17 June 1663 – March 1730) was a Roman Catholic prelate who served as Roman Catholic Archbishop of Naxos (1701–1730), Bishop of Syros and Milos (1694–1701), and Vicar Apostolic of Smyrna (1690–1694).
[2][3] On 13 January 1690, he was appointed during the papacy of Pope Alexander VIII as Vicar Apostolic of Smyrna.
[2] On 8 February 1694, he was appointed during the papacy of Pope Innocent XII as Bishop of Syros and Milos.
[1][2] On 2 May 1694, he was consecrated bishop by Odoardo Cibo, Titular Patriarch of Constantinople.
[1][2] On 24 January 1701, he was appointed during the papacy of Pope Clement XI as Archbishop of Naxos.