Capua Amphitheatre
Outside the town, in S. Maria Capua Vetere, there is the amphitheatre, built in the time of Augustus, restored by Hadrian and dedicated by Antoninus Pius, as the inscription over the main entrance recorded. The exterior was formed by 80 Doric arcades of four stories each, but only two arches now remain. The keystones were adorned with heads of divinities.
Inside the amphitheater.
The interior is better preserved; beneath the arena are subterranean passages like those in the amphitheatre at Puteoli. It is one of the largest in existence; the longer diameter is 170 m (185 yd), the shorter 140 m (152 yd), and the arena measures 75 by 45 m (83 by 49 yd), the corresponding dimensions in the Colosseum at Rome being 188, 155, 85, 53 m (205, 170, 93 and 58 yd).
http://en.wikipedia.org/wiki/Capua#Amphitheatre

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