Pope Pius IX

Giovanni Paolo Panini, Interior of St. Peter's, Rome, c. 1754 · Public domainGiovanni Paolo Panini, Interior of St. Peter's, Rome, c. 1754

Pope1846–1878

Who

Defined the Immaculate Conception in Ineffabilis Deus (1854), called the First Vatican Council, which defined papal infallibility, and lost the Papal States in 1870. The longest reigning pope after Peter.

Sources

Annuario Pontificio

Lineage

In the succession →

See of Rome, 1846–1878.

Succeeded: Pope Gregory XVI1831–1846
See of Rome, 1846–1878
Succeeded by: Pope Leo XIII1878–1903
See of Rome, 1878–1903

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