Acqua Vergine is one of the several aqueducts that serve the city of Rome, in Italy, with pure drinking water. The name derives from the name of its predecessor, Aqua Virgo, which was constructed by Marcus Agrippa in 19 BC, terminating at its castellum at the Baths of Agrippa, and, through a network of conduits, serving the vicinity in the Campus Martius. 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 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 in Piazza dei Crociferi. Due to several additions and modifications to the end-most points of the conduits during the years that followed, during the Renaissance and Baroque periods, the Acqua Vergine culminated in several magnificent mostre, the Trevi Fountain and the fountains of Piazza del Popolo, and other smaller fountains.