Template:On this day - March 26

Sisenand

• 631 – In Visigothic Hispania, the Hispanic nobles led by Sisenand, with the help of the Frankish king Dagobert, defeat and depose the Visigothic king Suintila.
• 717 – In Asturias (present-day Spain), 519 nobles proclaim Don Pelayo their first monarch.
• 1091 – In al-Andalus (present-day Spain), the Almoravids enter Córdoba.
• 1244 – James I of Aragon and the Infante Alfonso sign the Treaty of Almizra between the Crown of Aragon and the Crown of Castile, which fixed the boundaries of the Kingdom of Valencia in present-day Spain.
• 1344 – In present-day Spain, the Siege of Algeciras ends with the Castilian capture of the city after twenty-one months of siege against the troops of the Marinid Sultanate.
• 1350 – Death of Alfonso XI of Castile, Castilian king, called "the Avenger" (b. 1311).
• 1536 – In present-day Venezuela, the priest Francisco de Villacorta founds the city of San Pedro Mártir and builds the church under the invocation of Our Lady of La Asunción.
• 1566 – Death of Antonio de Cabezón, Spanish organist, harpist and composer of the Renaissance (b. 1510).
• 1713 – In the context of the War of the Spanish Succession, diplomatic representatives of Philip V agree with England on privileged conditions for its ships in Cádiz and the monopoly of the slave Asiento for thirty years.
• 1766 – In Spain, the Marquis of Esquilache is dismissed because of the riot that began three days earlier.
• 1812 – In present-day Venezuela, a magnitude 7.7 earthquake destroys the city of Caracas, leaving 26,000 victims; La Guaira, Barquisimeto, San Felipe and Mérida are also affected.
• 1815 – In Montevideo (present-day Uruguay), the Flag of Artigas is raised for the first time, a symbol of the independence of the Eastern Province (present-day Uruguay).
• 1844 – Death of Agustín de Argüelles, Spanish lawyer, politician and diplomat, nicknamed "the Divine" for his oratory during the Cortes of Cádiz (b. 1776).
• 1871 – Birth of Serafín Álvarez Quintero, one of the Álvarez Quintero brothers, a pair of Spanish playwrights and poets (d. 1938).
• 1913 – During the Mexican Revolution, Venustiano Carranza signs the Plan of Guadalupe, repudiating the coup government of Victoriano Huerta.
• 1929 – In Bahia (Brazil), the Spanish airplane piloted by captains Ignacio Jiménez Martínez and Francisco Iglesias Brage lands after a flight of 6745 kilometers over the Atlantic Ocean.
• 1937 – In Mediano (Spain), the first Francoist concentration camp opens, with prisoners from the Republican side, who carried out works on the reservoir for the irrigation of the Monegros area.
• 1991 – Argentina, Brazil, Paraguay and Uruguay sign the Treaty of Asunción, creating Mercosur.
• 1995 – A borderless Europe is born for seven Community countries: Germany, Belgium, Spain, France, the Netherlands, Luxembourg and Portugal. Some 215 million people can travel through the "Schengen area" without border controls.
• 1999 – In Paraguay, the political crisis known as the Paraguayan March takes place. The Government orders the police to fire on the demonstrators in front of Congress, leaving 7 dead and hundreds wounded.
• 2018 – In Mataje (Esmeraldas Province), near Ecuador's border with Colombia, three journalists of the newspaper El Comercio are kidnapped and later murdered by the Oliver Sinisterra Front.
• 2023 – In Chimborazo Province (Ecuador), the Alausí landslide occurs, sweeping away entire neighborhoods of the canton and leaving 65 dead, more than a hundred missing and extensive material damage.