Key Facts
- Duration
- 11 February 1873 – 29 December 1874
- Founded by
- Abdication of King Amadeo I
- Ended by
- Bourbon Restoration under Alfonso XII
- Notable reform
- Abolition of slavery in Puerto Rico
- Active conflicts
- Third Carlist War, Ten Years' War (Cuba), Cantonal rebellion
Imperial Zenith Metrics
Historical Trajectory
Phase I: Rise
The First Spanish Republic was proclaimed on 11 February 1873, the day after King Amadeo I abdicated. A parliamentary coalition of radicals, republicans, and democrats declared the new regime. It inherited severe instability, including the ongoing Third Carlist War since 1872 and the Ten Years' War in Cuba since 1868, leaving the young republic without a stable military or political foundation from its outset.
Phase II: Zenith
Despite its brevity, the republic enacted meaningful social legislation: it ended compulsory conscription, regulated child labor, and abolished slavery in Puerto Rico. These reforms reflected the ideals of its republican and democratic founders. The government also attempted to navigate tensions between federal republicans who sought regional autonomy and unitary republicans who favored centralized governance, shaping intense constitutional debates.
Phase III: Decline
The Cantonal rebellion of 1873, in which localities declared themselves independent cantons, further destabilized the republic. In January 1874, General Manuel Pavía staged a coup, dissolving the Cortes and installing a military dictatorship under General Francisco Serrano. In December 1874, General Arsenio Martínez Campos proclaimed Alfonso XII king at Sagunto, formally ending the republic and inaugurating the Bourbon Restoration.
Notable Imperial Reigns
Selected rulers mapping the empire’s trajectory