building itself was an oblong enclosed by walls, and is stated to be above 700 feet in length, by nearly 400 feet wide, or nearly half a mile in circuit.[32] Little remains of the structure excepting huge walls or carcases of brick, at one time covered with plates or blocks of marble, which have been removed, and either used in churches or other buildings, or, in accordance with a very vexatious custom, burnt for lime. The rooms, as indicated by the ruins left, must have been of great magnificence, not merely from their size and their marble pillars, coating, and flooring, but from the mosaics with which they were inlaid, and the splendid statues with which they were adorned. Some of the statues have been dug out of the ruins, and among them the famous large group called the Farnese Bull, which we saw in the museum of Naples, with many others now deposited in the museums of that city and of Rome. To accommodate the bathers, there were placed around the baths polished marble chairs (cool seats for the undressed), in those of Caracalla to the number of 1600, in those of Diocletian to the number of 3200. The scene during the bathing hours was no doubt very animated, for the baths were crowded. I may here state that the supply of water to modern Rome is both abundant and of good quality, a circumstance of great importance, and not always to be reckoned upon in other Italian cities, where the water is looked upon, perhaps justly, with great suspicion. * * * * * The Catacombs of Rome are very numerous and of great extent, and it has been calculated that if all the passages were placed in continuous line, they would extend to 545 miles. Those of Calixtus are what are most commonly visited.