The Diocese of Matelica (Latin: Dioecesis Mathelicensis) was a Roman Catholic diocese located in the town of Matelica in the Province of Macerata in the Italian region of Marche. In 1785, it was united with the Diocese of Fabriano to form the Diocese of Fabriano e Matelica.
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Roman Catholic Diocese of Matelica Wikipedia(Text) CC BY-SA