Formerly called the Banco de Londres building.
In 1959 a contest was held for the project at the invitation of the Headquarters of the Bank of London and South America. The land was located on a street corner in downtown Buenos Aires, where the financial activity was booming.
The winning design was submitted by the team Clorindo Testa, associated with S. E. P. R. A society, composed of architects: Elia Sanchez, Peralta Ramos and Agostini.
This project, for its urban architectural approach, is one of the most original, bold and far-reaching of the international architecture of the 60s. Source
Clorindo Manuel José Testa (December 10, 1923 – April 11, 2013) was an Italian-Argentine architect and artist.
Testa was one of the leaders of the Argentine rationalist movement and one of the pioneers of the brutalist movement in Argentina.[citation needed] His style as an architect has always been influenced by his artistic nature, with projects dominated by the effects of colour, tension, metaphors and plasticity; these aspects are well illustrated in his designs for the Biblioteca Nacional de la República Argentina and the Banco de Londres building in Buenos Aires. Wikipedia