 Such an abundant supply of water gives an idea how much water Rome had at its disposal.In his chief work, "De aquaeductu" (written in 97 CE), containing a history and description of the water-supply of Rome, Sextus Julius Frontinus ascribes only a meager volume to the Aqua Alsietina.This makes sense, if the naumachia was no longer in use in his time (second half of the first century CE).