Antonio Díaz was a Roman Catholic prelate who served as Apostolic Nuncio to Naples (1626–1627) and Bishop of Caserta (1616–1626).

[2] On 18 May 1616, Antonio Díaz was appointed during the papacy of Pope Paul V as Bishop of Caserta.

[2] On 15 May 1626, he was appointed Apostolic Nuncio to Naples by Pope Urban VIII.

[1][2] He served as Apostolic Nuncio to Naples until his resignation on 17 April 1627.

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