Revolutionary Italy 1849: Hygiea, Garibaldi in Rome, fall of Palermo

Astronomical Discovery. Annibale de Gasparis discovered the tenth known asteroid, Hygiea, on 12 April 1849 at the Astronomical Observatory of Capodimonte in Naples. He named it Igea Borbonica to honor King Ferdinand II, avoiding Bourbon repression. The discovery was announced to Rome and published in May 1849, though its symbol was not used in almanacs until later due to late announcements.

Defense of Rome. Garibaldi moved to Rome to support the Roman Republic after the Piedmontese defeat at Novara. French troops under General Charles Oudinot landed at Civitavecchia on 25 April 1849. On 30 April, Garibaldi's republican army defeated a numerically far superior French force at Porta San Pancrazio, repelling the initial French assault. In a later phase, Oudinot besieged and took Rome, crushing the short-lived republic and restoring Pope Pius IX's temporal power under French protection.

Fall of Palermo. The Kingdom of the Two Sicilies suppressed the Sicilian revolution using its own forces, including Swiss Guards. Palermo, the revolutionaries' capital and last stronghold, fell to the government on 15 May 1849. This reconquest ended the attempt of Sicilian secession, which had striven for independence from Naples rather than unified Italy.