Circus of Maxentius. The Circus of Maxentius is an ancient structure in Rome, Italy; it is part of a complex of buildings erected by emperor Maxentius on the Via Appia between AD 306 and 312.
   It is situated between the second and third miles of the Via Appia between the basilica and catacombs of San Sebastiano and the imposing late republican tomb of Caecilia Metella, which dominates the hill that rises immediately to the east of the complex. It is part of the Parco Regionale Appia Antica.
   The Circus itself is the best preserved in the area of Rome, and is second only in size to the Circus Maximus in Rome. The only games recorded at the circus were its inaugural ones and these are generally thought to have been funerary in character.
   They would have been held in honour of Maxentius' son Valerius Romulus, who died in AD 309 at a very young age and who was probably interred in the adjacent cylindrical tomb. The imperial box of the circus is connected, via a covered portico, to the villa of Maxentius, whose scant remains are today obscured by dense foliage, except for the apse of the basilical audience hall, which pokes out from the tree tops.
   The complex was probably never used after the death of Maxentius in AD 312. The circus is constructed, after the fashion of many Roman buildings of this period, in concrete faced with opus vittatum. The putlog holes which held the scaffolding are evident in man
Wikipedia ...