In the central chamber, the walls are divided into large compartments by columns of the Composite order, adorned with vine leaves. One of the large scenes represented here is that of Polyphemus, who, after having crushed his rival Acis with an enormous rock, turns towards Galatea, who is riding on a hippocampus. Another, placed above the frieze, is a picture of a domestic initiation ceremony, as the sacred tænia which is being presented seems to prove. A third picture, also above the frieze, shows the preparations for a sacrifice. On the right sits a female figure, with a mantle, and a faun standing before some utensils for ablution, which are being lifted by a second female figure, while the sacrificial kid is being brought by a young slave. The next picture represents a row of houses along the side of a street or road, at the door of one of which a lady with her maid is knocking, while four or five figures present themselves above on the balconies. The last picture is one of Io hidden in the wood of Juno at Mycenæ, and watched by Argos, with a figure of Hermes descending by Jove’s command to rescue Io. The names of Io, Argos, and Hermes are legible here. The room on the left hand of this one is also divided by Composite columns adorned with vine leaves, and by a beautiful frieze of giallo antico. The lower compartments have no figures, but the upper are ornamented with designs of genii and fantastic flowers. The room on the right hand is decorated with beautifully-designed paintings of flowers and fruit, hanging from one column to the next. From these festoons hang the emblems of various divinities, the lyre of Apollo, the timbrel of Cybele, and the mystic sieve and mask of Bacchus. These seem to indicate that this was the lararium of the house. The frieze contains a number of landscape and marine views, with many figures of men and animals painted on a yellow ground. At the north-western corner of the atrium opens a fourth chamber, which may perhaps have been the dining-room, or triclinium, decorated with trophies of sacred emblems of Diana and Apollo. The atrium communicates with the rooms at the back of the house and with a small courtyard by means of a corridor. Some of these rooms were used as baths, others seem to have opened towards the street, the pavement of which still remains along the side of the house. [Sidenote: Palatine temples.]