One of the greenhouses still maintains these historic arches and small cast-iron columns.

The storefront features cast-iron columns and two entrances that are accessed by iron steps and handrails.

The two free-standing platform canopies also have cast-iron columns with capitals, which date from 1861.

The ground floor banking hall, about 40 by 60 feet with ceilings about 22 feet high, is divided by soaring cast-iron columns.

The structure of the open warehouse floors consisted of cast-iron columns supporting steel, iron or heavy timber beams.

The cast-iron columns have been restored; the floor is of cherry wood from upstate New York.

"The internal structure is of timber, but with cast-iron columns in the basement."

The architectural styles of the time featured tall, cast-iron columns and large plate-glass windows.

Seven cast-iron columns supported the embossed cast-iron mushroom roof.

From a demolished 19th-century barracks at Windsor Castle come 16 cast-iron columns, each of which may sell for up to $4,000.