 New Orleans' French Quarter has the most famous and elaborate examples and the greatest concentration, with light, lacy often multi-level porches on over 400 buildings, transforming the area from the 1850s-1880s.A few similar porches can be found in Savannah's Historic District, and the Church Hill and Jackson Ward neighborhoods in Richmond, though here it is mostly used for stair, porch and balcony railings.Numerous foundries in all three cities produced unique ornamental and structural designs in cast iron.