In 1713, after the War of the Spanish Succession, Milan, Naples, and Sardinia were handed over to the Hapsburgs of Austria, which lost some of its Italian territories in 1735. After 1800, Italy was unified by Napoléon, who crowned himself king of Italy in 1805; but with the Congress of Vienna in 1815, Austria once again became the dominant power in a disunited Italy. Austrian armies crushed Italian uprisings in 1820–1821 and 1831. In the 1830s, Giuseppe Mazzini, a brilliant liberal nationalist, organized the Risorgimento (Resurrection), which laid the foundation for Italian unity. Disappointed Italian patriots looked to the House of Savoy for leadership. Count Camille di Cavour (1810–1861), prime minister of Sardinia in 1852 and the architect of a united Italy, joined England and France in the Crimean War (1853–1856), and in 1859 helped France in a war against Austria, thereby obtaining Lombardy. By plebiscite in 1860, Modena, Parma, Tuscany, and the Romagna voted to join Sardinia. In 1860, Giuseppe Garibaldi conquered Sicily and Naples and turned them over to Sardinia. Victor Emmanuel II, king of Sardinia, was proclaimed king of Italy in 1861. The annexation of Venetia in 1866 and of papal Rome in 1870 marked the complete unification of peninsular Italy into one nation under a constitutional monarchy.