Plaza de Mayo is as old as the city of Buenos Aires itself. Juan de Garay founded Buenos Aires city for the second time in 1580. At this time, he also decided the location of the Plaza Mayor, current Plaza de Mayo. From then on, the Plaza the Mayo has been the scenario of all the major events in the history of Buenos Aires. Even today, it's the meeting point of all major demonstrations, political revolts, and popular festivals.Erected in en 1811, it was the first historical monument of Buenos Aires, and it was declared as a National Historic Monument one year later;