鋳鉄
Cast iron was also taken up by some architects in the early 19th century where smaller supports or larger spans were required (and where wrought iron was too expensive), notably in the Royal Pavilion in Brighton, designed by John Nash and built between 1816-1823, where cast iron columns were used within the walls, as well as cast iron beams, to enable the construction of the decorative domes; the columns in the kitchens were disguised as palm trees.