The Diocese of Gradisca (Latin: Dioecesis Gradisca) was a Roman Catholic diocese located in the town of Gradisca d'Isonzo in the Princely County of Gorizia and Gradisca (later in the Province of Gorizia in Friuli-Venezia Giulia) for the short-lived union (only three years) of the Dioceses of Trieste, Gorizia and Pedena. In 1791, it was united with the re-established Archdiocese of Gorizia to form the Archdiocese of Gorizia e Gradisca."Diocese of Gradisca (d’Isonzo)" Catholic-Hierarchy.org. David M. Cheney. Retrieved August 25, 2016"Titular Archiepiscopal See of Gradisca" GCatholic.org. Gabriel Chow. Retrieved August 25, 2016 In 1986, it was restored as the Titular Archiepiscopal See of Gradisca.
Bishops Franz Philipp von Inzaghi (1788–1791 Appointed, Bishop of Gorizia e Gradisca) Titular Archbishops François Bacqué † (17 June 1988 - 9 November 2023 dead) Giordano Piccinotti, since 31 January 2024
See also Catholic Church in Italy Roman Catholic Diocese of Pedena Roman Catholic Diocese of Trieste
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