The layout of the mosaic room certainly resembles a Roman "triclinium", or dining room. There are twelve mythological scenes across four cubiculum and one triclinium. There are also two alae and a winter triclinium surrounding the atrium. The main room was probably a triclinium or reception room. Surrounding the peristyle were the bathrooms, kitchen and summer triclinium. Beside the small peristyle are a triclinium and a cubiculum. They concluded that the grotto is actually a nymphaeum or underground triclinium from Neronian times. It begins with the summer triclinium of Livia's "Villa ad Gallinas Albas". Writings by Josephus suggest that the Last Supper took place in a triclinium. The thermal baths and the elliptical peristyle with the triclinium are centred on separate axes. The final mythological scene in the south-east triclinium is Cyparissus on the north wall. The triclinium had three couches surrounding a table. Later on, a separate dining room with dining couches was designed, called a "triclinium". On the north side next to Ariana Villa are a triclinium, a cubiculum. The arrangement of the three couples prefigures the triclinium of Roman dining.