The amphiteatre is situated in between two hills (Guasco and Cappuccini), just some km far away from the sea, and it is dated back to the end of 1st century A.C., the Ottaviano Augusto’s period. Thanks to the studies, we know that the amphitheatre saw its last transformation during the Traiano’s empire in the following century. It offered 20 terraces in 3 orders that could host up to 10.000 spectators. Nowadays only the building perimeter and the first order of terraces are still preserved but two entries are well visible: the main Porta Pompae and the secondary Porta Libitinensis.