The national flag of the Argentine Republic, often referred to as the Argentine flag, is a triband, composed of three equally wide horizontal bands coloured light blue and white. There are multiple interpretations on the reasons for those colors. The flag was created by Manuel Belgrano, in line with the creation of the Cockade of Argentina, and was first raised at the city of Rosario on February 27, 1812, during the Argentine War of Independence. The National Flag Memorial was later built on the site. The First Triumvirate did not approve the use of the flag, but the Asamblea del Año XIII allowed the use of the flag as a war flag. It was the Congress of Tucumán which finally designated it as the national flag, in 1816. A yellow Sun of May was added to the center in 1818.

Manuel José Joaquín del Corazón de Jesús Belgrano y González, usually referred to as Manuel Belgrano, was an Argentine public servant, economist, lawyer, politician, journalist, and military leader. He took part in the Argentine Wars of Independence and designed what became the flag of Argentina. Argentines regard him as one of the main Founding Fathers of the country.