Exposición Internacional del Centenario

The Argentine Centennial International Exhibition (Spanish: Exposición Internacional del Centenario Argentino) was an exhibition held between May and November 1910 in Buenos Aires, to commemorate the Centennial of the May Revolution in Argentina (the formation of the first local government on May 25, 1810). With a population of around 1.2 million, Buenos Aires was then the largest urban complex in Latin America, the eighth city in the world, and one of the richest.

Source: Wikipedia — Exposición Internacional del Centenario (CC BY-SA 4.0)