The Roman Republic (Italian: Repubblica Romana) was a short-lived state declared on 9 February 1849, when the government of the Papal States was temporarily replaced by a republican government due to Pope Pius IX's departure to Gaeta. The republic was led by Carlo Armellini, Giuseppe Mazzini, and Aurelio Saffi. Together they formed a triumvirate, a reflection of a form of government during the first century BC crisis of the Roman Republic.
One of the major innovations the Republic hoped to achieve was enshrined in its constitution: freedom of religion, with Pope Pius IX and his successors guaranteed the right to govern the Catholic Church.