Irrigation systems (52 Subjects)
Remains of the central hall of the Thermae of Diocletian in Rome. A large part of construction material of the hall was used to build the palace of Pope Sixtus V on Esquiline hill.
View of Piazza Navona, Rome. In the foreground, the Fountain of Neptune. In the background, the Fontana dei Quatri Fiumi with the Egyptian obelisk known as Obelisk of Domitian.