Fountain in Piazza Santa Maria in Trastevere by a Roman aqueduct, the Aqua Traiana. When the aqueduct was ruined during the invasions of Rome, water came from underground sources below the Janiculum hill. The old fountain illustrated in the drawing of del Massaio had two vasques, one above the other, pouring water into the basin below. The fountain was reconstructed between 1499 and 1500 on the command of Giovanni Lopez, the bishop of Perouse and Bishop of the parish of Santa Maria in Trastevere, who gave the commission to Donato Bramante, the architect of St. Peter's Basilica. Bramante removed the upper vasque and added four carved stone
Fountain worthy capital of the Christian world. In 1453, he began to rebuild the Acqua Vergine, the ruined Roman aqueduct which had brought clean drinking water to the city from eight miles (13 km) away. He also decided to revive the Roman custom of marking the arrival point of an aqueduct with a "mostra", a grand commemorative fountain. He commissioned the architect Leon Battista Alberti to build a wall fountain where the Trevi Fountain is now located. The aqueduct he restored, with modifications and extensions, eventually supplied water to the Trevi Fountain and the famous baroque fountains in the Piazza del