Template:On this day - August 21

Ildefonso Cerdá

• 1157 – Death of Alfonso VII of León, crowned Imperator totius Hispaniae (Emperor of all Hispania) (b. 1105).
• 1415 – The Battle of Ceuta takes place between the Kingdom of Portugal and the Marinid Sultanate.
• 1520 – In Medina del Campo, the troops of Charles I set fire to the town in the course of the War of the Communities of Castile.
• 1622 – Death of the Count of Villamediana, Spanish aristocrat, Postmaster General and poet (b. 1582).
• 1689 – Birth of José Pradas Gallén, Spanish Baroque composer (d. 1757).
• 1739 – Birth of Mariano Salvador Maella, Spanish painter (d. 1819).
• 1842 – Death of Leona Vicario, New Spanish insurgent during the Mexican War of Independence (b. 1789).
• 1876 – Death of Ildefonso Cerdá, Spanish urban planning engineer and politician (b. 1815).
• 1906 – Birth of Joaquim Homs, Spanish composer (d. 2003).
• 1906 – Birth of Braulio Aurelio Moyano, Argentine scientist, neurobiologist and psychiatrist of the Argentine-German Neurobiological School (d. 1959).
• 1940 – In Mexico City, Leon Trotsky dies after an attack the previous day by the Soviet NKVD agent Ramón Mercader.
• 1945 – In Mexico City the Spanish Government in exile is constituted, headed by José Giral.
• 1975 – In Madrid (Spain) the GRAPO begins its activity by killing two dogs of the canine unit of the Civil Guard.
• 1983 – Death of Bobby Deglané, Chilean radio announcer based in Spain (b. 1905).
• 2010 – Death of Hugo Guerrero Marthineitz, Peruvian announcer and television host based in Argentina (b. 1924).