July 25, 1968: The 50th Anniversary of the Encyclical, Humanae Vitae

Pope Pius XII & Giovanni Montini (Pope St. Paul VI)

Cardinal Roncalli (Pope St. John XXIII & Giovanni Montini (Pope St. Paul VI)

Pope (St.) Paul VI & Albino Luciani (Pope John Paul I)

Pope (St.) Paul VI & Karol Wojtyla (Pope St. John Paul II)