Rome (1870)

Rome (1870)
source
Name	Rome (1870)
Caption	Capture of Rome, 20 September 1870
Date	20 September 1870
Place	Rome, Papal States, Italian Peninsula
Result	Annexation of Rome into the Kingdom of Italy
Combatant1	Kingdom of Italy
Combatant2	Papal States
Commander1	Victor Emmanuel II; Raffaele Cadorna
Commander2	Pope Pius IX; General Hermann Kanzler
Strength1	Italian Army corps and bersaglieri
Strength2	Papal Zouaves and papal troops
Casualties1	Light
Casualties2	Light

Rome (1870)

Rome in 1870 was the focal point of the final act of Italian unification when forces of the Kingdom of Italy entered the Papal States and annexed the city, ending centuries of temporal power held by the Papacy under Pope Pius IX. This event linked the Risorgimento campaigns of figures such as Giuseppe Garibaldi, Camillo Benso, Count of Cavour, and Victor Emmanuel II to the consolidation of the Italian Peninsula into a unified nation-state. The seizure of Rome followed diplomatic shifts involving the Second French Empire, the Franco-Prussian War, and the retreat of Napoleon III's protection, producing immediate political, social, and international ramifications across Europe and the Catholic Church.

Background: Rome before 1870

In the decades preceding 1870 the city of Rome remained the capital of the Papal States, ruled as a temporal domain by Pope Pius IX and administered through institutions such as the Pontifical Swiss Guard and the Roman Curia. The broader Italian unification movement—known as the Risorgimento—featured campaigns by Giuseppe Garibaldi, diplomatic strategy by Camillo Benso, Count of Cavour, and military victories by the Kingdom of Sardinia that culminated in the proclamation of the Kingdom of Italy under Victor Emmanuel II in 1861. Rome, together with provinces like the Kingdom of the Two Sicilies and territories such as Lombardy and Veneto, remained outside Italian control due to the intervention of Napoleon III and the presence of French garrisons. The 1864 September Convention between the Kingdom of Italy and the Second French Empire sought to neutralize tensions by relocating the Italian capital to Florence, while guaranteeing papal independence—an arrangement destabilized by the outbreak of the Franco-Prussian War.

Capture of Rome

The capture itself occurred on 20 September 1870 when Italian forces under Raffaele Cadorna and units of the Italian Army breached the Aurelian Walls near the Porta Pia after an artillery bombardment and a short assault; the breach was engineered with field artillery and sapping operations. The papal defenders, including international volunteers known as the Papal Zouaves and commanded by General Hermann Kanzler, resisted but were outnumbered and politically isolated following the withdrawal of French Empire troops after Napoleon III's capture at the Battle of Sedan and the fall of the Second French Empire. The capitulation of papal forces led to the formal annexation of Rome by the Kingdom of Italy through a plebiscite held in October 1870, and the city was declared the capital of Italy in 1871, transferring institutions from Florence and attracting ministries, embassies such as those of France, Austria-Hungary, and United Kingdom, and cultural bodies to the new national seat.

Political and administrative changes

After annexation, the Italian state implemented administrative reforms transforming municipal governance, integrating papal territories into provincial frameworks like Latium, and secularizing institutions including former papal courts and archives. The Italian Parliament and ministries of the Kingdom of Italy established their presence in Rome, while monarchic patronage by Victor Emmanuel II and the liberal policies influenced by leaders from Piedmont-Sardinia reshaped civic administration. The Law of Guarantees (1871) attempted to define relations between the Italian state and Pope Pius IX by offering personal honors and financial compensation, but it was rejected by the Pope, who considered himself a "prisoner" within the Vatican and later promulgated the doctrine of papal non-recognition that affected diplomatic engagements with states such as Spain, Belgium, and Portugal.

Social and cultural impact

The transfer of sovereignty altered Rome's social fabric: aristocratic patronage networks tied to the Curia diminished while bourgeois classes from Turin, Milan, and Naples entered political and commercial life. Urban redevelopment projects, influenced by planners and architects connected to movements in Paris and Vienna, led to modernization of infrastructure, roads, and public buildings, including expansions near the Quirinal Palace and the restoration of monuments such as the Colosseum and the Roman Forum for national symbolism. Cultural institutions—the Accademia Nazionale di San Luca, museums like the Capitoline Museums, and academic circles tied to Università di Roma La Sapienza—were integrated into a national narrative celebrating antiquity and the Risorgimento, while tensions persisted between clerical conservatives loyal to the Holy See and anticlerical liberals from the Historical Left and Historical Right.

International reaction and diplomatic consequences

The capture provoked strong reactions across Europe and beyond. The Holy See denounced the annexation and appealed to Catholic monarchs and governments such as Austria-Hungary, the German Empire, and the Russian Empire to contest Italian actions, while liberal capitals including London and Paris adopted pragmatic recognition policies. The change in status contributed to the realignment of alliances after the Franco-Prussian War and influenced diplomatic questions addressed at international gatherings involving the Congress of Berlin milieu; it affected relations with the United States and with colonial powers engaged in the Scramble for Africa by adjusting perceptions of Italian national strength. The papal rejection of the Law of Guarantees produced a prolonged standoff known as the "Roman Question," which shaped Vatican diplomacy and influenced Catholic political movements in countries such as France and Belgium.

Legacy and integration into the Kingdom of Italy

The legacy of Rome's annexation includes its role as the symbolic and administrative capital of a unified Italy, its transformation into a center for national ceremonies like those commemorating the Risorgimento and figures such as Giuseppe Mazzini and Giuseppe Garibaldi, and the long-term resolution of the "Roman Question" by the Lateran Treaty of 1929 between the Kingdom of Italy and the Holy See. Integration accelerated modernization, expanded national institutions including the Italian Royal Army and diplomatic service, and redefined Italian identity through monuments and historiography that linked ancient Rome to contemporary nationhood. The events of 1870 remain contested in debates over secularism, papal temporal power, and the historical memory preserved in institutions such as the Vatican Museums and the Municipio Roma Capitale.

Category:History of Rome Category:Unification of Italy Category:1870