The Upper and Lower Pontalba Buildings, which line the St. Ann and St. Peter Street sides of Jackson Square, were built in 1850 by the Baroness Micaela Almonester de Pontalba, the daughter of Don Andres Almonester y Roxas, the Spanish colonial landowner associated with the neighboring Cabildo, Cathedral and Presbytere. Inspired by the imposing Parisian architecture the Baroness favored, the distinctive rowhouses were intended to serve as both elegant residences and fine retail establishments. In 1921 the Pontalba family sold the Lower Pontalba Building to philanthropist William Ratcliff Irby who subsequently, in 1927, bequeathed it to the State Museum.