Embassy of the United States to the Holy See to the Holy See, previously located on Aventine Hill, moved to new headquarters in September 2015 in a separate building on the same compound as the United States Embassy Rome. 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
Foreign relations of the Holy See accredited also to the Holy See. For reasons of economy, therefore, smaller countries accredit to the Holy See a mission situated elsewhere and accredited also to the country of residence and perhaps other countries. Massimo Franco, author of "Parallel Empires", asserted in April 2009 that the Obama administration had put forward three candidates for consideration but each of them had been deemed insufficiently pro-life by the Vatican. This claim was denied by the Holy See's spokesman Federico Lombardi, and was dismissed by Thomas Patrick Melady, former United States Ambassador to the Holy See, as being in conflict with diplomatic practice.