The Teniente General Castiñeiras building stands on a triangular plot of land in the heart of Buenos Aires, one of the most emblematic of the city's modern architecture. Better known as the SOMISA Building, its origin was the result of a design competition for the design of the new headquarters of the Sociedad Mixta Siderúrgica Argentina company. The first prize was won by MRA+A, Mario Roberto Álvarez & Associates, and its construction began around 1966, with the works completed in 1977.
