races. It may have had an ornamental façade, perhaps added by Trajan when the seats of the circus were carried up thus far(Gnomon, 1927, p. 593 Verlag C.H.Beck). From this curved terrace a large arched opening, visible in drawings of the sixteenth century (Heemskerck II; Wyngaerde) led into the courtyard complex. Gallery See also List of ancient monuments in Rome References Other sources A Topographical Dictionary of Ancient Rome, Samuel Ball Platner (as completed and revised by Thomas Ashby):Oxford University Press, 1929 External links Palatine Hill Ancient palaces in Rome