Trienio Liberal

Kingdom of Spain
España
Reino de España
1820–1823
Motto: Plus ultra (Latin)
(English: "Further Beyond")
Anthem: Himno de Riego
Anthem of Riego
CapitalMadrid
Common languagesSpanish
Religion
Roman Catholic Church (official)
Demonym(s)Spanish
GovernmentUnitary parliamentary semi-constitutional monarchy
King 
• 1820–1823
Ferdinand VII
Secretary of State 
• 1820–1821
Evaristo Pérez
• 1821–1822
Ramón López-Pelegrín
• 1822
Francisco Martínez
• 1822–1823
Evaristo Fernández
• 1823
José María Pando
LegislatureCortes Generales
Historical eraRevolutions during the 1820s
1 January 1820
7 March 1820
April – May 1820
October – December 1822
1 October 1823
CurrencySpanish dollar
Preceded by
Succeeded by
Sexenio Absolutista
Ominous Decade

The Trienio Liberal, ([ˈtɾjenjo liβeˈɾal]) or Three Liberal Years, was a period of three years in the modern history of Spain between 1820 and 1823, when a liberal government ruled Spain after a military uprising in January 1820 by the lieutenant-colonel Rafael de Riego against the absolutist rule of Ferdinand VII.

It ended in 1823 when, with the approval of the crowned heads of Europe, a French army invaded Spain and reinstated the King's absolute power. This invasion is known in France as the "Spanish Expedition" (expédition d’Espagne) and in Spain as "The Hundred Thousand Sons of St. Louis".