The Kingdom of Italy was formed through the unification of the Italian peninsula under the House of Savoy in 186. The United States officially recognized Italy in the same year. The American Legation in Italy was elevated to an embassy in 1893, and apart from a three-year interruption during World War II the United States and Italy have maintained diplomatic relations ever since.
The U.S. Embassy in Rome was once the home of Queen Margherita, the first queen of Italy. After her death in 1926, the Palazzo Margherita was partitioned into offices for the National Fascist Confederation of Farmers and then purchased by the U.S. government in 1946. Since then, the 300-year-old building has been carefully preserved and upgraded to meet modern security requirements.