Diplomatic representation from the US: chief of mission: Ambassador Callista GINGRICH (since 22 December 2017)
embassy: American Embassy to the Holy See, Via Sallustiana, 49, 00187 Rome, Italy
mailing address: Unit 5660, Box 66, DPO AE 09624-0066
telephone:  (06) 4674-1
FAX:  (06) 4674-3412
Definition: This entry includes the chief of mission, embassy address, mailing address, telephone number, FAX number, branch office locations, consulate general locations, and consulate locations.
Source: CIA World Factbook - This page was last updated on January 20, 2018