# Pope Pius XI - Pope

URL: https://christianity-history.com/popes/pope-pius-xi
Pontificate: 6 February 1922 – 10 February 1939
Number in the papal list: 259
Born-Died: 1857-05-31 - 1939-02-10
Papal era: Modern Papacy
Wikipedia: https://en.wikipedia.org/wiki/Pope_Pius_XI

Subject of the Kingdom of Lombardy–Venetia, later becoming an Italian citizen. Signed the Lateran Treaty with Italy (1929), establishing Vatican City as a sovereign state.

## Succession
- Previous in list: [Pope Benedict XV](https://christianity-history.com/popes/pope-benedict-xv)
- Next in list: [Pope Pius XII](https://christianity-history.com/popes/pope-pius-xii)

## Timeline events during this pontificate
- 1925 - [Scopes trial](https://christianity-history.com/timeline/1925-scopes-trial)
- 1929 - [Lateran Treaty](https://christianity-history.com/timeline/1929-lateran-treaty)
- 1931 - [Vatican Radio](https://christianity-history.com/timeline/1931-vatican-radio)
- 1933 - [Reichskonkordat](https://christianity-history.com/timeline/1933-reichskonkordat)
- 1934 - [Barmen Declaration](https://christianity-history.com/timeline/1934-barmen-declaration)
- 1937 - [Mit brennender Sorge](https://christianity-history.com/timeline/1937-mit-brennender-sorge)