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Why did Pope Pius IX refuse to recognize the Kingdom of Italy?

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Photograph of Pope Pius IX — Pius IX Pius IX is the longest-reigning pope in the history of the Roman Catholic Church. His pontificate lasted from 1846 to 1878.

Pope Pius IX refused to recognize the Kingdom of Italy primarily because he viewed the loss of his temporal power as a direct threat to his spiritual authority. He believed that his role as a sovereign ruler was essential to protect the church's independence and interests.1

Following the occupation of Rome by Italian troops in 1870 and the subsequent annexation of the Papal States, Pius IX rejected the Law of Guarantees, which attempted to regulate the relationship between the papacy and the new Italian state. He considered the seizure of his territories an act of revolution and an unacceptable alteration of his position. Consequently, he remained a self-described "prisoner in the Vatican," refusing any formal intercourse with the Italian government. This standoff, known as the Roman question, was not formally resolved until the Lateran Treaty of 1929.21345