The Apostolic Nunciature in the United States of America is the diplomatic mission of the Holy See to the USA.

 

The Holy See has the longest tradition of diplomatic initiatives of any sovereign entity in the world today. Since the time of Constantine in the fourth century, the Pope, as the Bishop of Rome, exercises unique spiritual and temporal authority and has sent and received delegates to and from other leaders in attempts to clarify Church teaching and stabilize international peace and other issues.