Template:On this day - September 26

Jorge Agustín Nicolás Ruiz de Santayana y Borrás

• 1493 – In Rome, Pope Alexander VI issues the papal bull Dudum siquidem in favor of Ferdinand and Isabella, monarchs of Castile and Aragon, extending to them the grant of lands made in the bull Inter caetera.
• 1591 – Antonio Pérez del Hierro, Secretary of the Chamber and of the Council of State of Philip II, accused of treason to the Crown and of the murder of Juan de Escobedo, flees Spain.
• 1758 – Birth of Cosme Mariano Argerich, Argentine physician (d. 1820).
• 1888 – Death of Modesto Inacayal, Tehuelche cacique who lived in Argentine Patagonia (b. 1833).
• 1933 – In Mexico, a hurricane devastates Tampico, leaving more than a thousand dead.
• 1936 – During the Spanish Civil War, the destroyer Almirante Ferrándiz (AF) is sunk by an almost impossible shot from 16 kilometers away at the Battle of Cape Espartel, in the struggle for control of the Strait of Gibraltar.
• 1952 – Death of George Santayana, Spanish philosopher, essayist, poet and novelist who grew up and was educated in the United States and wrote almost all his work in English (b. 1863).
• 1967 – At La Higuera (Bolivia), the guerrillas Coco Peredo, Manuel Hernández and Mario Gutiérrez, companions of Che Guevara, fall into an ambush.
• 1967 – Death of Luis Ceballos y Fernández de Córdoba, Spanish engineer and naturalist (b. 1896).
• 1970 – In Managua (Nicaragua), the Old Cathedral is occupied by students of the Central American University (UCA) in protest against the Somoza dictatorship.
• 1998 – Death of Aurelio Miró Quesada Sosa, Peruvian journalist and historian (b. 1907).
• 2010 – Death of Constantino Kochifas, shipowner and businessman of the Chiloé and Aysén area (Chilean Patagonia) (b. 1931).
• 2014 – A forced disappearance in Iguala (Mexico) of 43 young students of the Ayotzinapa Normal School takes place, involving municipal authorities and organized crime, with the support of federal forces.
• 2016 – Signing of the peace agreements between the government of Juan Manuel Santos and the FARC, after more than fifty years of conflict in Colombia.