Apostolic Nunciature in the United States of America

The Apostolic Nunciature to the United States, sometimes referred to as the Vatican Embassy, is the diplomatic mission of the Holy See to the United States. It is located at 3339 Massachusetts Avenue, Northwest, Washington, D.C., in the Embassy Row neighborhood.

Source: Wikipedia — Apostolic Nunciature in the United States of America (CC BY-SA 4.0)