The headquarters of the Banco de Londres y América del Sur or Bank of London and South America in Buenos Aires was designed by Argentine architects Clorindo Testa and SEPRA. It is located in San Nicolás.
In 1959, a design contest was announced the project by the Bank of London and South America. The land was located on a street corner in the Buenos Aires CBD, an area housing nearly half the nation's financial activity. The winning design was submitted by Clorindo Testa and SEPRA.
The project's architectural approach was among the most far-reaching and well-known local contributions to international architecture of the 1960s, as well as the country's most easily identifiable example of Brutalist architecture.
Wikipedia https://en.wikipedia.org/wiki/Banco_de_Londres_y_América_del_Sur_Headquarters
Coordinates -34°36'22.732" N -58°22'19.131" E