Fig 1 The flower on the top of the tholus or cupola Fig 2 The plan of the upper surface of the flower Fig 3 A perpendicu - Stuart James & Revett Nicholas - 1762, 1794

James stuart & nicholas revett. The antiquities of athens measured and delineated by james stuart f. R. S. And f. S. A. And nicholas revett painters and αrchitects, vol. Iii (ed. Willey reveley), london, john nichols, 1794. Date: 1794.