Spain

Historical overview

Spain’s political history includes the unification of the crowns of Castile and Aragon, imperial expansion, constitutional struggles, civil war, dictatorship and the transition to parliamentary democracy.

The Constitution of Cádiz, adopted on 19 March 1812 during the Peninsular War against Napoleon, was a landmark in Spanish constitutional history. It established national sovereignty and a constitutional monarchy, although its implementation was interrupted by the restoration of absolutism. Spain’s nineteenth century was characterised by conflict between liberal and conservative political forces, repeated constitutional changes and the loss of most of its overseas empire in the Americas. ConstituciónThe First Spanish Republic was proclaimed in 1873 but lasted less than two years. The Bourbon monarchy was restored in 1874. In 1898, Spain lost Cuba, Puerto Rico and the Philippines following war with the United States.

The Second Spanish Republic was proclaimed on 14 April 1931. Its government introduced significant reforms concerning education, the military, land and the relationship between church and state. Political polarisation and social conflict intensified, and a military uprising in July 1936 triggered the Spanish Civil War. The war ended in April 1939 with the victory of General Francisco Franco’s forces. Franco established an authoritarian dictatorship that lasted until his death in November 1975.

The transition to democracy began after Franco’s death. The 1977 general election produced a constituent parliamentary process, and the Constitution of 1978 established a parliamentary monarchy, fundamental rights, regional autonomy and constitutional institutions. The 1981 attempted coup demonstrated that democratic consolidation remained vulnerable. Spain joined the European Communities in 1986.

Key historical timeline

1. 1469Marriage of Isabella of Castile and Ferdinand of Aragon strengthens dynastic union.
2. 1492Granada conquered; Columbus’s first voyage begins Spanish imperial expansion in the Americas.
3. 1700Death of Charles II triggers the War of the Spanish Succession.
4. 1812Constitution of Cádiz adopted on 19 March.
5. 1833–40First Carlist War.
6. 1868Glorious Revolution removes Queen Isabella II.
7. 1873First Spanish Republic proclaimed.
8. 1874Bourbon monarchy restored.
9. 1898Spain loses Cuba, Puerto Rico and the Philippines to the United States.
10. 1923Military coup led by Miguel Primo de Rivera.
11. 1931Second Spanish Republic proclaimed.
12. 1936–39Spanish Civil War.
13. 1939Franco’s dictatorship established after Nationalist victory.
14. 1947Law of Succession declares Spain a kingdom, while Franco retains power.
15. 1975Franco dies; Juan Carlos I becomes king.
16. 1977First democratic general election since the Civil War.
17. 1978Constitution approved by referendum on 6 December.
18. 1981Failed military coup attempt on 23 February.
19. 1986Spain joins the European Communities.
20. 2007Historical Memory Law adopted.
21. 2022Democratic Memory Law adopted.Important historical documents to digitiseConstitution of Cádiz (1812).Spanish constitutions of 1837, 1845, 1869, 1876 and 1931.Records of the Second Republic.Military uprising documents and Civil War records.Franco-era legislation and official records.Amnesty Law (1977).Moncloa Pacts (1977).Constitution of 1978.Records of the 23 February 1981 coup attempt.Historical Memory Law (2007).Democratic Memory Law (2022).

Archive notes

Archive and research links

PARES – Portal of Spanish Archives – the Spanish Ministry of Culture’s digital portal, with archival descriptions and digitised documents.

Congress of Deputies – Spanish Constitutions, 1812–1978 – original constitutional texts and explanatory material.

Congress of Deputies – Constitution of Cádiz (1812) – primary constitutional document.

Spanish Ministry of Culture – national archival and historical-heritage information.

Congress of Deputies – parliamentary records and democratic transition material.

Editorial note: The Spanish Civil War and Franco dictatorship remain subjects of intense historical and political debate. A credible archive should document repression by Francoist forces, violence in Republican territory, political imprisonment, executions, exile, forced displacement and the experiences of civilians. Attribute casualty figures and legal interpretations to clearly identified research institutions.