From 1998, the excavation campaigns conducted by the Groupe of Archeological Research of Narbonne (G.R.A.N) proceed to the uncovering of the baths, bordering the House of the Grand Triclinium. From the beginning, pipes, briquettes, suspensura bricks, cut blocks reddened by fire and ashes are found suggesting the presence of baths. However, several facts obscure their readability and interpretation: pits dug by material collectors, the discovery of a previous state with basins for the processing of seafood, and finally the fact that these facilities extend under the cemetery of Cité. The excavated bathing complex extends over 600 m2. From the street D, one entered into a room from which the other rooms opened. The next room (the apodyterium, that is to say, the changing room) from which few wall decorations remain is equipped with benches covered with waterproof mortar painted red. As in Pompeii, guests left their clothes there. Then they went into the hot room located on hypocaust (ground placed on columns of briquettes to let hot air circulate). A fireplace was heating it. Two pools with cold water, clad in marble and the larger one being covered, were available to the swimmers. The bath houses were generally offered by a rich dignitary allowing him to display his fortune and power to increase his popularity. They are often richly decorated: marble, statues, murals, mosaic floors. The operation, maintenance and renewal of the paintings are regularly ensured.The water was supplied by lead pipes and two wells. The used water was evacuated via a network of sewers to the street C.The passage to the frigidarium (cold room) preceded the immersion into the cold water of the pool (natatio)