Edificio Sudamérica, Modern architectural complex in Retiro district, Buenos Aires, Argentina.

Edificio Sudamérica is a residential complex at Cerrito 1482 and Posadas, made of two independent volumes. The lower one, at Cerrito 1488, rises 47 metres over a ground floor and 13 floors, each holding one apartment. The taller volume, set back at Posadas 1100, reaches 97 metres with a ground floor and 31 floors, four apartments per floor, and a curved facade of modular panels with venecitas on the sides.

Architect Arturo Dubourg designed the Edificio Sudamérica in 1956, and construction finished only in June 1964. According to Dubourg it was the first tower under horizontal property approved by the Municipality of Buenos Aires, which had introduced that regime in 1957. The project was built by engineer Francisco Schmidt.

The building's name and its position at the northern end of Avenida 9 de Julio tie it to the avenue's widening in the 1970s, which opened this sector. Its buyers were sought in a neighbourhood described in the sources as aristocratic by tradition, and the amenities were pitched at that social level.

The building sits directly on one of the city's main avenues, with clear visibility from the wide Avenida 9 de Julio. Its location near the city center makes it an easy destination to visit on foot to see the modern architecture.

The building features an innovative radiant floor heating system and a central clothes drying system using steam-heated metal pipes, which were uncommon in the 1950s. These technical features show how advanced the building's amenities were for its era.