Roman Republic (1849–1850)
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.
Source: Wikipedia — Roman Republic (1849–1850) (CC BY-SA 4.0)