Evariste Blanc built the mansion you see before you around 1834. According to city directories, Evariste Blanc was a hardware merchant, ship chandler, and lime merchant. By 1834 Blanc also had a brick-making company, and some sources contend he was real-estate developer as well.
Following Blanc's death, his widow, Marie Fannie Labatut Blanc, planned to donate the property to the Archdiocese of New Orleans for a parish church. After Madame Blanc's death in 1875 her daughter, Sylvanie Blanc Denegre, acquired the property, donating it to the foundation of Our Lady of the Rosary Parish in 1905. In 1907 the home became the parish rectory, and it is still being used for that purpose today.