Frederick Moore Simpson , Simpson’s History of Architectural Development, Renaissance Architecture, vol. IV, Londres,  Longmans, Green & Co 1954, p. 284.

The aqueducs acroos the Campagna and above all the warehouse and granaries of Ostia, the port at the mouth of the Tiber, show imperial efficiently at his highest.How different from these were the poor, private work tunnel out by the autonomous cities, the caddis-fly architecture of mixed materials, nearly always inferior, that marred the last days of Pompeii, the exedrae and theatres lavished on Greece by private fairy-godfather.