The southern facade features a pergola of Chadsworth PolyStone® columns, a Serliana window designed to allow light into the stair hall, and Bermuda shutters to shade the south-facing rooms. 10" x 8' Tuscan PolyStone® Plain Tapered columns. Chadsworth Cottage Figure Eight Island Residential, Exterior, Outdoor Structures, Pergolas, New Old House Magazine