former monetary unit of Spain. The peseta ceased to be legal tender in 2002, when the euro, the monetary unit of the European Union, was adopted as the country's sole monetary unit. In 1868 the peseta replaced the peso, which had been adopted in the 15th century and which was known in full as the peso de ocho (“piece of eight”), as Spain's currency. (The peso continues to be the monetary unit of many former Spanish colonies in North and South America.) Initially the peseta was established in anticipation of Spain's joining the Latin Monetary Union, which was created in 1865 and linked the currencies of France, Italy, Belgium, Switzerland, and later Greece; however, Spain eventually chose not to participate.

The peseta itself became a major point of contention during the Spanish Civil War (1936–39). Both the Nationalists, led by General Francisco Franco (Franco, Francisco), and the Republicans minted coins, but the coins minted by the Republicans (which contained nonprecious metal) were not accepted by the Nationalists as legal tender. Eventually, Franco became dictator of Spain, and during his long reign (1939–75) his image appeared on banknotes and coins. After Franco's death King Juan Carlos became the sovereign of democratic Spain, and his likeness and those of historical figures in Spain's past (e.g., Christopher Columbus (Columbus, Christopher) and Hernán Cortés (Cortés, Hernán, marqués del Valle de Oaxaca)) replaced Franco's on the country's currency.