Head of the Catholic Church from 1958 to 1963 who was the first pope to take the name "John" in more than 500 years.
He completed his doctorate in theology and was ordained a priest in the Church of Santa Maria in Monte Santo in 1904.
His frequent habit of sneaking out of the Vatican late at night to walk the streets of the city of Rome earned him the nickname "Johnny Walker."
He had twelve brothers and sisters.
He was beatified by Pope John Paul II in 2000.