Juan Francisco de la Cerda, 8th Duke of Medinaceli

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Juan Francisco de la Cerda Enríquez de Ribera (Medinaceli, 4 November 1637 – Madrid, 20 February 1691), 8th Duke of Medinaceli, 7th Marquis de Cogolludo, 4th Marquis of Alcalá de la Alameda, 6th Duke of Alcalá de los Gazules, 9th Count of Los Molares, 9th Marquis of Tarifa, 8th Count of El Puerto de Santa María, was a Spanish noble and politician, and chief minister of King Charles II of Spain.

During his tenure as chief minister of Spain (1680-1685), de la Cerda enforced a number of economic reforms aimed at reducing the galloping inflation, avoiding the permanent deficit, and filling the coffers of Spanish Monarchy. De la Cerda's policies achieved one of the largest deflations in history, which proved very beneficial to the King's subjects, increasing their incomes and purchasing powers.^[1] However, his measures failed to fill the royal coffers, led to food riots, and eventually caused his downfall in 1685. Most of his policies were nevertheless continued and expanded by his successor as chief minister, the Count of Oropesa, and are credited with fostering the economic recovery of Spain.^[2]