Vital to all human societies, water is for the Romans the very symbol of its existence from Romulus, the founder of Rome, was saved from the waters of the Tiber and gives them power over natural forces and man. This book describes how they used water to meet their immediate needs, but also how she was hired for pleasure and frivolity. With precision engineering that will surprise and amaze simplicity that the layman, the author portrays the dogged pursuit of underground and aerial techniques, which allowed to obtain water from the mountains, driving to the cities, purify, preserve, and evacuate. Romans appear in their intimacy, their talk about the sources or latrines, and surprising his admiration for the emperors built their sumptuous baths, there is also the calculations of the engineers, their polls, their failures and successes and, above all, the strong will of a people, to dominate the source of life, built across the plains and deep valleys powerful and elegant arches of the aqueducts.