. Pope Pius XI (Italian: Pio XI), born Ambrogio Damiano Achille Ratti (Italian: [amˈbrɔ:dʒo daˈmja:no aˈkille ˈratti]; 31 May 1857 – 10 February 1939), was the Bishop of Rome and head of the Catholic Church from 6 February 1922 to 10 February 1939. He also became the first sovereign of the Vatican City State upon its creation as an independent state on 11 February 1929. He remained pope until his death in February 1939.
https://en.wikipedia.org/wiki/Pope_Pius_XI