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
Protectorate of the Holy See Protectorate of the Holy See At the San Remo conference (19-26 April 1920), the Mandate for Palestine was allocated to Great Britain. France required the continuation of its religious protectorate in Palestine but Italy and Great Britain opposed it. France lost the religious protectorate, but, thanks to the Holy See, continued to enjoy liturgical honors in Mandatory Palestine until 1924, when the honors were abolished. The precise boundaries of all territories, including that of the British Mandate for Palestine, were left unspecified, to "be determined by the Principal Allied Powers". During that time, the British were in control of Palestine