The Archdiocese of Udine is a Latin Church ecclesiastical territory or archdiocese of the Catholic Church in Italy. The see was established in 1752 when the Patriarchal see of Aquileia was divided. From 1818 to 1846 it was a suffragan diocese of the Patriarch of Venice.

The Archdiocese of Gorizia (Latin: Archidioecesis Goritiensis is a Latin archdiocese of the Catholic Church in Italy. The archiepiscopal see of Gorizia was founded in 1751 when the Patriarchate of Aquileia was abolished, and its territory divided between two new dioceses, Udine and Gorizia. The diocese of Gorizia was suppressed in 1788 for the creation of the Diocese of Gradisca and re-established in 1791 as the Diocese of Gorizia e Gradisca. It was raised again to a metropolitan archdiocese in 1830.