Temporal power of the Holy See

Papal tiara of Pope Pius IX, the last pope to have reigned over the Papal States.

The Holy See exercised political and secular influence, as distinguished from its spiritual and pastoral activity, while the pope ruled the Papal States in central Italy.

The Papal States ceased to exist following the capture of Rome in 1870 by the Royal Italian Army, after which its remaining territories were annexed to the Kingdom of Italy. The Lateran Treaty of 1929 later established the Vatican City, a small city-state where the Holy See currently exercises temporal powers.