How does Diptych of the Lampadii elucidate its Description and style?
The image on the surviving panel is divided into two parts.
On the upper register there is an important individual, most likely the senator Lampadius, who holds a sceptre topped by an image of the Emperor in one hand and the white cloth (or mappa) for giving the signal to begin the games in his other hand. Either side of him, depicted at a smaller scale are two other functionaries, perhaps his sons. The three individuals are inside a box decorated with panels with geometric patterns. Behind them a cornice supports a curvilinear architrave, above which the fragmentary inscription is found.In the lower register of the panel is a stylisted version of the race course in the circus, which four quadrigae, each drawn by four horses which run around the spina (the median strip) which has an obelisk in the centre, covered with stylised simplifications of Egyptian hieroglyphs. This might recall the Circus Maximus and its obelisks. At the two ends of the spina are things which seem to represent groups of statuary. 
The depiction of the race track is very interesting both for its subject matter and for its technical execution, which stylises the course and all its features within the restricted space of the panel in a very efficient way, using side, front, and back views of the space alternately.
Egyptian hieroglyphs Circus Maximus circus architrave senator Lampadius quadriga obelisk