The Cabildo of Buenos Aires is the public building in Buenos Aires that was used as a seat of the town council during the colonial era and the government house of the Viceroyalty of the Río de la Plata. Today the building is used as a museum.

The Plaza de Mayo is a city square and the main foundational site of Buenos Aires, Argentina. It was formed in 1884 after the demolition of the Recova building, unifying the city's Plaza Mayor and Plaza de Armas, by that time known as Plaza de la Victoria and Plaza 25 de Mayo, respectively. The city centre of Buenos Aires, Plaza de Mayo has been the scene of the most momentous events in Argentine history, as well as the largest popular demonstrations in the country. On the occasion of the first anniversary of the May Revolution in 1811, the Pirámide de Mayo was inaugurated in the square's hub, becoming Buenos Aires' first national monument.