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.