Pope
Pope Blessed Pius IX
Pope from 1846 to 1878
Pope Blessed Pius IX, who reigned as Roman Pontiff from 1846–1878.
Background
Blessed Pope Pius IX had the longest verified pontificate in history. He defined the dogma of the Immaculate Conception (1854), convened the First Vatican Council (1869-70), which defined papal infallibility, and witnessed the loss of the Papal States.
Summary
Pope Blessed Pius IX, who reigned as Roman Pontiff from 1846–1878.
Papacy began
1846
Papacy ended
1878
Birth name
Giovanni Maria Mastai-Ferretti