The Diocese of Belluno-Feltre is a Latin diocese of the Catholic Church located in the Veneto, northern Italy, organized in its current form in 1986. From 1197 to 1762, and again from 1818 to 1986, the Diocese of Belluno and the Diocese of Feltre were united under a single bishop, with the name diocese of Belluno e Feltre. The current diocese is a suffragan of the Patriarchate of Venice.

The Patriarchate of Venice, also sometimes called the Archdiocese of Venice, is a Latin Church ecclesiastical territory or patriarchal archdiocese of the Catholic Church in Venice, Italy. In 1451 the Patriarchate of Grado was merged with the Bishopric of Castello and Venice to form the Archdiocese of Venice.