How did the Roman Question affect relations between the Italian state and the Roman Catholic Church?

The Roman Question was a protracted dispute between the Italian state and the papacy following the 1870 unification of Italy and the seizure of the Papal States. This conflict fundamentally strained relations, as Pope Pius IX refused to recognize the new kingdom, viewing himself as a prisoner within the Vatican.12

The tension manifested in several ways:

• Political Nonparticipation: The Holy See issued the non expedit, a policy prohibiting Italian Catholics from participating in national politics, which led to significant political absenteeism.3
• Legislative Impasse: The Italian government attempted to resolve the status of the pope through the Law of Guarantees in 1871. While this law offered the pope sovereign status, financial compensation, and control over Vatican properties, Pius IX rejected it because it did not restore his temporal power.42
• Resolution: The dispute persisted for decades until it was finally settled by the Lateran Treaty in 1929, which established Vatican City as an independent state.12