Acqua Vergine

Its terminal castellum is located at the Baths of Agrippa, and it served the vicinity of Campus Martius through its various conduits.

In an effort to restore fresh water to Rome during the Renaissance, Pope Nicholas V, in 1453, renovated the main channels of the Aqua Virgo[1] and added numerous secondary conduits under Campo Marzio.

The original terminus, called a mostra, which means showpiece, was the stately, dignified wall fountain designed by Leon Battista Alberti[1][2] in Piazza dei Crociferi.

Beginning as rainwater falling on the Alban Hills to the east of Rome, then percolating through miles of volcanic tuff, the water springs forth in marshland approximately eight miles to the east of Rome off Via Collatina, in a small town called Salone.

From the same source, but running different courses, two separate aqueducts emerge: Today, as in days of old, the Acqua Vergine is regarded as furnishing some of the purest drinking-water in Rome, reputed for its restorative qualities.