Embassy of the United States to the Holy See Embassy of the United States to the Holy See The Embassy of the United States of America to the Holy See (or Embassy Vatican for short) is the diplomatic mission of United States of America to the Holy See, a term referring to the central government and universal reach of the Roman Catholic Church. The current embassy moved to new headquarters in September 2015 in a separate building on the same compound as the United States Embassy Rome. The embassy was previously located on Aventine Hill in the Villa Domiziana in Rome, Italy, which was built as a private residence
Holy See the city of Rome. Every see is considered holy. In Greek, the adjective "holy" or "sacred" ( transliterated as "hiera") is constantly applied to all such sees as a matter of course. In the West, the adjective is not commonly added, but it does form part of an official title of two sees: besides the Diocese of Rome ("the Holy See"), the Bishopric of Mainz (the former Archbishopric of Mainz, which was also of electoral and primatial rank) bears the title of "the Holy See of Mainz" (Latin: "Sancta Sedes Moguntina"). The apostolic see of Rome was established in the