Between the seventh and tenth centuries, architects started adding more rooms, doors, and windows to buildings. Making large rooms with an elaborate superstructure requires more sophisticated skills. Roofs, doors, and windows were still made by placing a horizontal beam across two vertical columns, a style of architecture called trabeate or corbelled style of architecture. Between the eighth and thirteenth centuries, the trabeate style was used in the construction of temples, mosques, tombs, and in buildings attached to large stepped – wells.
