I think that it is a good time to write up on the Cabildo of Buenos Aires, given that we are approaching the end of May (a crucial date in the history of Argentina). The Cabildo was in its origins a political institution. Nowadays, when we refer to the Cabildo, we actually mean the building that held the local government of the City of Buenos Aires in its colonial past. Today, the building holds the Museo Nacional del Cabildo y la Revolución de Mayo (National Museum of the Cabildo and the Revolution of May 1810). A witness to the most significant events which led to the Argentine independence.
The original structure was built between the years 1606 and 1610, on the land where the actual Cabildo is now emplaced. A series of different constructions and modifications took place along the years. The way it can be seen today was finished in 1940.
On the 22nd of May 1810, a Cabildo Abierto (sort of a general meeting between the residents of Buenos Aires) was celebrated, where it was decided that the Spanish Viceroy, the highest political authority in the city, was to be deposed, and a provisional government was to be put in his place. These were the first definitive steps in the road to the argentine independence from Spain and the founding stone of our history as an independent nation.