Plaza San Martin is one of the oldest squares in Buenos Aires. As mentioned in previous version of this plaza from 2009 it was established as a location for residences of Spanish governors long before it was sold to British South Sea company in 1713.

It changed hands after revolution of 1810 and general Jose de San Martin located military barracks here. It was also used for demonstration of military power. In 1883 numerous buildings were demolished and the whole place converted to plaza.

Surrounding area become preferable for wealthiest Argentinians and numerous architecturally significant mansions are facing the open space.