Portal:Argentina/Anniversaries/May/May 21


 * 1534: Pedro de Mendoza is appointed adelantado of the Río de la Plata
 * 1810: Viceroy Baltasar Hidalgo de Cisneros calls for an open cabildo
 * 1813: The Assembly of the Year XIII abolishes nobility titles and torture
 * 1903: Birth of de facto president Pedro Eugenio Aramburu