The Pontalba Buildings form two sides of Jackson Square in the French Quarter of New Orleans, Louisiana.

Baroness Pontalba, an accomplished businesswoman, invested in real estate, purchasing the land on the upriver and downriver sides of the Place d'Armes.

The building fronting Rue St. Peter, upriver from Jackson Square, is the upper Pontalba.

The heirs sold the lower building to local philanthropist William Ratcliffe Irby, who in turn bequeathed the property to the Louisiana State Museum.

In the short story "Hidden Gardens," Truman Capote describes them as "the oldest, in some ways most somberly elegant, apartment houses in America, the Pontalba Buildings."