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| Treaty of Rome (1864) | |
|---|---|
| Name | Treaty of Rome (1864) |
| Date signed | 1864 |
| Location | Rome |
| Parties | Kingdom of Italy; Kingdom of France; Papal States; Kingdom of Sardinia; United Kingdom; Kingdom of Spain |
| Language | Italian; French |
Treaty of Rome (1864)
The Treaty of Rome (1864) was a multilateral agreement concluded in Rome that addressed territorial, diplomatic, and religious arrangements among the Kingdom of Italy, the Kingdom of France, the Papal States, the Kingdom of Sardinia, the United Kingdom and the Kingdom of Spain. It emerged during the aftermath of the Second Italian War of Independence, the Risorgimento, and the diplomatic realignments following the Congress of Vienna and the Crimean War. The instrument sought to reconcile competing claims by balancing the interests of Pope Pius IX, Camillo Benso, Count of Cavour, Napoleon III, the Italian unification movement and other European powers.
In the 1850s and 1860s the political geography of the Italian peninsula was contested by the Papal States, the Kingdom of Sardinia, and revolutionary forces inspired by figures like Giuseppe Garibaldi and Giuseppe Mazzini, while foreign influence from the French Empire (Second) under Napoleon III and the diplomatic pressure of the Austrian Empire, the Russian Empire, and the British Empire shaped outcomes. The aftermath of the Battle of Solferino and the diplomatic initiatives of Count Cavour created an environment where the status of Rome, the prerogatives of Pope Pius IX, and the role of the French garrison in Rome required settlement. Contemporaneous treaties such as the Plombières Agreement and precedents like the Treaty of Zurich informed bargaining positions alongside events in Venice and the incorporation of territories following the Second Italian War of Independence.
Negotiations involved diplomats from the Kingdom of Italy, envoys from the French Second Empire, plenipotentiaries representing the Papal States, and observers from the United Kingdom, Spain, and other capitals including Vienna and St. Petersburg. Formal discussions took place in Rome and in neutral salons frequented by figures tied to the Vatican, the Italian government in Turin, and representatives associated with the Holy See. Keys to consensus included assurances on papal temporal rights, guarantees of free exercise of religion, and arrangements for diplomatic recognition affirmed by instruments similar in procedure to the Congress of Paris (1856) and the Treaty of Paris (1856). The treaty text was signed in 1864 amid ceremonies invoking precedents from the Lateran Council and diplomatic protocols practiced at the Austrian Embassy and the British Embassy in Rome.
The treaty's principal clauses delineated territorial adjustments affecting the Papal States and neighboring entities, provisions for the status of the Apostolic Palace, stipulations concerning papal sovereignty, and guarantees for foreign missions such as the French garrison and legations of the United Kingdom and Spain. It included articles on the privileges of the Roman Curia, the legal protection of ecclesiastical properties, and arrangements for transit and communications comparable to agreements in the Treaty of London (1861). The instrument contained provisions on the appointment of clergy, the protection of pilgrimage routes to St. Peter's Basilica, and clauses addressing the rights of citizens of signatory states residing in papal territories. Economic aspects referenced customs and toll exemptions reminiscent of earlier compacts signed by the Kingdom of Sardinia and the Austro-Hungarian Empire.
Implementation relied on joint guarantees by the French Second Empire and assurances from the Kingdom of Italy to respect clauses safeguarding the Holy See and ecclesiastical institutions represented by Pope Pius IX. Enforcement mechanisms involved diplomatic residency, consular protection by the United Kingdom and Spain, and the presence of military garrisons analogous to deployment patterns after the Crimean War. Compliance disputes were to be mediated through the same multilateral channels used at the Congress of Vienna and invoked by signatories in subsequent commissions, with ad hoc arbitration proposed by figures from Paris, London, and Vienna. Practical difficulties in enforcement arose from tensions between nationalizing forces linked to Giuseppe Garibaldi and conservative guards loyal to the Papal States.
Contemporary responses varied: the French Empire touted the treaty as a diplomatic success preserving its influence in Italy, while the Kingdom of Italy presented the instrument as a transitional arrangement toward full incorporation of Rome. The United Kingdom and Spain viewed the settlement through the lens of European balance-of-power politics shaped by actors in St. Petersburg and Vienna, and parliamentary debates in Westminster reflected concerns about precedent and intervention. The agreement influenced subsequent accords involving the Lateran Treaty and informed diplomatic practice during the later reign of Victor Emmanuel II and the pontificate of Pius IX, shaping interactions among capitals including Paris, Berlin, and Rome.
Historically the treaty is remembered for its role in the complex sequence of arrangements that preceded the formal capture of Rome and the Italian capital status debates culminating in 1870; it helped define the diplomatic posture of the Papal States and influenced the evolution of relations among the Italian monarchy, the Holy See, and European powers. Its provisions foreshadowed elements later negotiated in the Lateran Treaties and contributed to historiographical interpretations by scholars tracing the Risorgimento, the decline of temporal papal power, and the reshaping of 19th-century European diplomacy. The treaty remains a point of reference in studies of 19th-century negotiation practices involving political figures such as Count Cavour, Napoleon III, and Pope Pius IX.
Category:1864 treaties Category:19th century in Rome Category:Italian unification