ظهارة (قماش)

thumb|The "Bardi Dossal" in the Bardi Chapel of Santa Croce, Florence. This is usually so called, but is an [[altarpiece and might also be called a retable or reredos. The shelf it rises from is a gradine.]] thumb|Dossal curtain, below a painted altarpiece, Weston-on-the-Green, Oxfordshire thumb|Green riddel curtains, with a metalwork dossal, in the Mass of St Gilles by the Master of Saint Giles