The Domus Flavia was the centre of the official life of the imperial court. This complex was divided in three great parts, the hall of the Throne, the Peristyle and the Triclinium. The hall of the Throne was a large room 30 m wide and 40 m long, with two aisles on each side, the Lararium, sanctuary of the Lares gods and the Basilica where the Emperor dispensed justice. The adjacent courtyard, or peristyle, was surrounded by a portico and in its centre a huge octogonal basin. At last the Triclinium, or dining room, with its floor covered with polychrome marble.