List of Famous people with last name Xxiii

Pope John XXIII was Bishop of Rome and hence head of the Catholic Church and sovereign of the Vatican City State from 28 October 1958 to his death in 1963. Angelo Giuseppe Roncalli was one of thirteen children born to a family of sharecroppers who lived in a village in Lombardy. He was ordained to the priesthood on 10 August 1904 and served in a number of posts, as nuncio in France and a delegate to Bulgaria, Greece and Turkey. In a consistory on 12 January 1953 Pope Pius XII made Roncalli a cardinal as the Cardinal-Priest of Santa Prisca in addition to naming him as the Patriarch of Venice. Roncalli was unexpectedly elected pope on 28 October 1958 at age 76 after 11 ballots. Pope John XXIII surprised those who expected him to be a caretaker pope by calling the historic Second Vatican Council (1962–1965), the first session opening on 11 October 1962.

Baldassarre Cossa was Pisan antipope John XXIII (1410–1415) during the Western Schism. The Catholic Church regards him as an antipope, as he opposed Pope Gregory XII whom the Catholic Church now recognizes as the rightful successor of Saint Peter.