Behind the scene of the Large Theatre there is a large quadrangle surrounded by 74 Doric grey tuff columns of Nocera used as a foyer, an area where the spectators could stop during the intervals of the theatre shows. After the earthquake of 62 AD the building changed its function and became a barracks for gladiators, which resulted in certain parts of the building being reorganised. The most important rooms were those on the eastern side whereas the rooms upstairs may have been the apartments of the undertaker of the gladiators.

Rich weapons used in the parades that preceded the battles are now kept in the National Archaeological Museum of Naples, they were found in two wooden boxes. Many victims were found here, such as four skeletons of slaves and 18 of free men were, including a woman with a very rich collection of jewels.

Date of excavation: 1766-1769; 1771; 1792-1795.