Template:On this day - September 15

Juan de Villanueva

• 800 – At the Monastery of Taranco de Mena, the first mention of the term "Castile" to designate a specific territory is found in an apocryphal document.
• 1739 – Birth of Juan de Villanueva, Spanish architect (d. 1811).
• 1810 – In the Viceroyalty of New Spain, a coup d'état is carried out against Viceroy José de Iturrigaray, who supported the liberal-leaning Junta of Mexico.
• 1817 – In Venezuela, Simón Bolívar decrees the incorporation of the Province of Guayana into the pro-independence cause.
• 1821 – In Guatemala, the Act of Independence of the Captaincy General of Guatemala is signed, an occasion celebrated by the States of Guatemala, El Salvador, Honduras, Nicaragua and Costa Rica as the Independence of Central America.
• 1829 – In Mexico, President Vicente Guerrero issues a decree abolishing slavery, although his government falls shortly afterwards and the abolition is declared unconstitutional in 1831.
• 1830 – Birth of Porfirio Díaz, Mexican general, president in 1876 and 1877-1880 and dictator between 1884 and 1911 (d. 1915).
• 1972 – Birth of Letizia Ortiz, Queen consort of Spain.
• 2006 – Fidel Castro is elected for the second time president of the NAM (Non-Aligned Movement).
• 2008 – In Morelia (Mexico), a terrorist attack takes place in the middle of the ceremony celebrating the beginning of the independence movement, leaving 8 dead and more than 130 wounded.
• 2014 – Death of Francisco Dotras Lamberti, Spanish diplomat, businessman, painter, writer and broadcaster (b. 1921).
• 2023 – Death of Fernando Botero, Colombian figurative painter, sculptor and draftsman (b. 1932).