20. See Gruter Inscrip. p. 1 78. The six princes are all mentioned, Diocletian and Maximian as the senior Augusti, and fathers of the emperors. They jointly dedicate, for the use of their own Romans, this magnificent edifice. The architects have delineated the ruins of these Thermae, and the antiquarians, particularly Donatus and Nardini, have ascertained the ground which they covered. One of the great rooms is now the Carthusian church; and even one of the porter's lodges is sufficient to form another church, which belongs to the Feuillans.