Holy See–United States relations https://en.wikipedia.org/wiki/Holy_See_United_States_relations
The current United States Ambassador to the Holy See is Joe Donnelly, who replaced the ad interim Chargé d'Affaires, Patrick Connell, on April 11, 2021. The Holy See is represented by its apostolic nuncio, Archbishop Christophe Pierre, who assumed office on April 12, 2016. The U.S. Embassy to the Holy See is located in Rome, in the Villa Domiziana. The Nunciature to the United States is located in Washington, D.C., at 3339 Massachusetts Avenue, N.W.
History
1797–1867
The United States maintained consular relations with the Papal States from 1797 under President George Washington and Pope Pius VI to 1867 and President Andrew Johnson and Pope Pius IX. Diplomatic relations existed with the Pope, in his capacity as head of state of the Papal States, from 1848 under President James K. Polk to 1867 under President Andrew Johnson, though not at the ambassadorial level. These relations lapsed when on February 28, 1867, Congress passed legislation that prohibited any future funding of United States diplomatic missions to the Holy See. This decision was based on mounting anti-Catholic sentiment in the United States,[1] fueled by the conviction and hanging of Mary Surratt, and three other Catholics, for taking part in the conspiracy to assassinate President Abraham Lincoln. Her son, John Surratt, also Catholic, was accused of plotting with John Wilkes Booth in the Assassination of Abraham Lincoln. He served briefly as a Pontifical Zouave but was recognized and arrested. He escaped to Egypt but was eventually arrested and extradited. There was also an allegation that the Pope had forbidden the celebration of Protestant religious services, which had been held weekly in the home of the American Minister in Rome, within the walls of the city.[2]
History
1867–1984
From 1867 to 1984, the United States did not have diplomatic relations with the Holy See in the wake of rumors of Catholic implication in the Lincoln assassination.[3]
Road to Rome: U.S.-Vatican diplomatic ties still vital after 40 years
Vatican City — March 14, 2024
The United States established formal diplomatic relations with the Holy See 40 years ago, and the current ambassador in Rome says its mission has been a wonderful success.
"We've tried to hew very closely to the mission that we've been given, and we have a great relationship with the Vatican," said Joe Donnelly, U.S. ambassador to the Holy See.
A former U.S. senator from Indiana and former member of the U.S. House of Representatives, Donnelly assumed his new and unexpected diplomatic post in Rome in April 2022, presenting his letters of credential to Pope Francis.
https://www.ncronline.org/road-rome-us-vatican-diplomatic-ties-still-vital-after-40-years