Which rights did the Law of Guarantees offer to Pope Pius IX?

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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.

The Law of Guarantees, passed in 1871, was an attempt by the Italian government to define its relationship with Pius IX following the loss of his temporal power. Although the Pope adamantly rejected the law, it offered him several specific rights and privileges:

Sovereign Status: The Pope was granted the status of a sovereign person.1
Diplomatic Freedom: He was assured the right to receive ambassadors and communicate freely with Roman Catholic bishops globally.1
Financial Support: The law provided a substantial annual income.1
Property Usage: He was granted the perpetual use of the Vatican and Lateran palaces in Rome, as well as the villa of Castel Gandolfo.1

While Pius IX refused to formally accept these terms, he and his successors effectively utilized many of these provisions until the Lateran Treaty of 1929 established a formal reconciliation.1