Pope Pius IX proposed the idea of a Roman seminary to train men from the United States, which was strongly supported by Archbishops John Hughes and Francis Kenrick. Its first location, Casa Santa Maria, was threatened by the government during the unrest of Italian unification, but President Chester Arthur's intervention on behalf of the American bishops enabled the Church to retain possession. Rising numbers of American vocations in the twentieth century necessitated a new structure, which was located on the Janiculum Hill overlooking St. Peter's Basilica and was dedicated December 8, 1952. The NAC counts many bishops among its alumni.