Vestigii delle Therme di Dioclitiano dalla parte di fuori qual risguarda verso Libecchio et Roma,….

C.17th engraving of the Baths of Diocletian which were public baths in ancient Rome, named after emperor Diocletian and built from 298 AD to 306 AD, they were the largest of the imperial baths. The project was originally commissioned by Maximian upon his return to Rome in the autumn of 298 and was continued after his and Diocletian’s abdication under Constantius, father of Constantine.

From, Vestigi delle Antichita di Roma Tivoli Pozzuoli et altri luochi.