The Headquarters of the Bank of the Argentine Nation (Spanish: Casa Central del Banco de la Nación Argentina), more often referred locally as Banco Nación Casa Central, is a monumental bank building next to the Plaza de Mayo, founding site of Buenos Aires and host of major events in the history of the country.

Designed by renowned Argentine architect Alejandro Bustillo in a Neoclassical style with French influences, the 100,000 m2 (1,100,000 sq ft) building occupies an entire city block and was inaugurated in 1944.

The building is located close to Casa Rosada, which is the official workplace of the President of the Argentine Republic.

In 1938 Alejandro Bustillo presented a new design for a much larger, 100,000 m2 (1,100,000 sq ft) structure, which was built in two stages between 1940 and 1955.

[1] The building is also home to the Alejandro Bustillo Art Gallery, established in 1971, as well as to a historic and numismatic museum.