 In architecture and other decorative arts, diaper is applied as a decorative treatment of a surface with a repeat pattern of squares (chequers), rectangles, or lozenges.Diaper was particularly used in mediaeval stained glass to increase the vividness of a coloured pane, for example the field in a shield of arms.A stone wall may be decorated with such a pattern sculpted in relief; in brickwork the effect may be achieved by using bricks of different colours, or by allowing certain bricks to protrude from the wall's surface to create a regular diamond-shaped pattern.