1936 visit by Eugenio Pacelli to the United States

Eugenio Cardinal Pacelli (the soon-to-be Pope Pius XII) visited the United States for two weeks in October–November 1936 as Cardinal Secretary of State and Camerlengo of the Holy Roman Church. At the time, Pacelli was the highest-ranking Catholic official ever to visit the US. Although he did not visit the US as Pope, he was the first Pope who visited the US at any time in his life.

Source: Wikipedia — 1936 visit by Eugenio Pacelli to the United States (CC BY-SA 4.0)