Repair of the walls of Rome.
'It is important to preserve as well as to create. We are earnestly anxious to keep the walls of Rome in good repair, and have therefore ordered the Lucrine port[233] to furnish 25,000 tiles annually for this purpose. See that this is done, that the cavities which have been formed by the fall of stones may be roofed over with tiles, and so preserved, and that thus we may deserve the thanks of ancient kings, to whose works we have given immortal youth.'