Pope John XXIII was head of the Catholic Church from 1958 until his death in 1963. He was also the "Patriarch of Venice" and upon his death, he was canonized by Pope Paul VI who declared him a Servant of God. He was then beatified by Pope John Paul II and officially declared a Saint. For all his kindly nature and good deeds, he is called by people around the world, "Il Papa Buono" or "Good Pope John". Here is an original signature by the Holy Father.