YPF building, National historical monument in Buenos Aires, Argentina

The YPF building occupies a triangular plot bounded by Diagonal Norte, Esmeralda and Perón streets, with 15 upper floors above a ground floor and three basements. Its reinforced-concrete skeleton carries concrete outer walls and hollow-brick inner walls separated by an air chamber. A private corridor linked employees to the Diagonal Norte station on Line C.

Built in 1938 as the headquarters for Yacimientos Petrolíferos Fiscales, the structure symbolized Argentina's growing industrial strength. Its construction reflected the nation's goal of achieving energy independence at that time.

The ground floor held a large hall and exhibition rooms, while the 12th and 13th floors housed the Club Social YPF and an assembly hall. A private corridor linked the building directly to the Diagonal Norte station of subway line C, reserved for employees.

The building occupies a triangular plot bounded by Diagonal Norte and Esmeralda and Perón streets, in the San Nicolás neighbourhood. Access is split: the Subsecretaría de Integración Socio Urbana enters from Diagonal Norte, while AESA staff use the Esmeralda entrance. A private corridor has linked the building to the Diagonal Norte station on Line C since it opened.

The structure was long a symbol of Argentina's oil industry and shaped the appearance of the city center. Today it stands as an important part of the architectural heritage showing how industry and modernity came together.