Casa Central del Banco de la Provincia de Buenos Aires, Rationalist bank building in San Nicolás district, Buenos Aires, Argentina.

Casa Central del Banco de la Provincia de Buenos Aires is a rationalist bank building at the corner of San Martín and Bartolomé Mitre streets. Its facade is clad in pale beige Argentine Dolomite blocks, with a tall vertical bay of dark-green metal-framed windows on the left and three fluted columns framing the entrance on the right, above which "BANCO DE LA PROVINCIA DE BUENOS AIRES" is inscribed. Four flags on angled poles project between the columns, and the basement held the bank's treasury and machine room.

The bank was founded in 1822 as Banco de Buenos Aires on this same site, San Martín 35, and returned here in 1827 after a spell at the Manzana de las Luces. A second building by Henry Hunt and Hans Schroeder stood from 1870 to 1874. After a 1936 competition won by Gregorio Sánchez, Ernesto Lagos and Luis María de la Torre, demolition began in 1939 and the first stage opened on 20 December 1940; the Mitre street sector followed in 1950–1953 and the corner in 1958–1964.

The main hall features zodiac designs rendered in colored marble with bronze details, creating an ornate interior space. Sculptured figures representing Agriculture and Industry stand at the entrance, embodying symbols of the nation's economic foundations.

The building is centrally located in the San Nicolás district, making it easily accessible on foot from various transit hubs. The street corner location serves as a clear landmark for visitors wanting to view the rationalist details from the exterior.

The building integrates provincial emblems and wheat spike patterns throughout its design, weaving the region's agricultural heritage directly into the architecture. These decorative elements reveal how the bank was intended to embody regional identity through both institutional and artistic means.