1857 – Born on May 31st on Desio, Italy. Italian pope, one of the most important modern pontiffs whose motto “the peace of Christ in the Kingdom of Christ” illustrated his work to construct a new Christendom based on world peace.
1879 – Was ordained, became a scholar, a paleographer, and prefect of the Vatican library.
1921 – He was ordained as a cardinal.
1922 – Became a Roman Catholic Pope on February 6th.
1929 – He concluded Lateran Treaty with Benito Mussolini.
1939 – Died on February 10th in Rome, Italy.