The Church of Saint Susanna at the baths of Diocletian (Italian: Chiesa di Santa Susanna alle Terme di Diocleziano) is a Roman Catholic parish church on the Quirinal hill in Rome, with a titulus associated to its site that dates back to about 280. The modern church dedicated to Saint Susanna was rebuilt in 1585–1603. In 1921, Pope Benedict XV authorized the Paulist Fathers to use Santa Susanna to create the National church in Rome of The United States of America. The first public Mass for the American community was celebrated by Cardinal William Henry O'Connell on February 26, 1922 and until today, the English–speaking Roman parish ministers to American Catholics living in or visiting Rome. From 1958 to 1985, the post of Cardinal Priest of the titulus Sancta Susannae was given to the Archbishop of Boston on his creation as cardinal. The most recent such appointment was that of Bernard Francis Law, who in 2002 resigned the archbishopric but kept the titulus of Santa Susanna. The Paulist Fathers have served Santa Susanna since the 1920s.