Known by the name of Aquae Volaterranaee
also frequented by Lorenzo De ‘Medici
A 3rd century Roman military map the Tabula Itineraria Peutingeriana, identifies to important baths the Aquas Volaternas and the Aquae Populaniae and between them a circular lake which probably represents an area rich in boron with numerous hot water lakes.
The Aquas Volaternas have been identified as the baths of Bagno a Morbo near Larderello which were particularly appreciated during the Middle Ages and Renaissance for the curative properties of the water. All traces of the Aquae Populaniae were completely lost until an archaeological dig in the area of Sasso Pisano uncovered Etruscan and Roman baths, named Bagno del Re, which can be easily identified as Aquae Populaniae.