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
Administration of the Property of the Holy See the Patrimony of the Apostolic See. Administration of the Property of the Holy See Administration of the Property of the Holy See (, abbreviated ABSS) was a commission that, until 1967, administered the property of the Holy See other than the money in cash and Italian government bonds received when the Financial Convention attached to the Lateran Treaty of 1929 was implemented. Its origin lay in the decision of Pope Leo XIII on 9 August 1878 to appoint his then Secretary of State also as Prefect of the Sacred Palace and Administrator of the patrimony remaining to the Holy See