Stock photography, photos: Congo Square - New Orleans, LA Stock photos of On Sunday afternoons, slaves were permitted to dance, sing and play drums in Congo Square. Much of today's Mardi Gras traditions began with these activities. New Orleans, Louisiana. USA Photograph: © Robert Burch Click for a larger image and more information Keywords associated with this stock photo: usa, united states, city, cities, new orleans, Louisiana, congo square, slaves, slavery