Portrait of Sextus Julius Frontinus, high-rank Roman magistrate, who worked in the high-rank positions, even at technical levels, reaching the charge of superintendent of acqueducts in Rome . those positions made him well respected and gave him great notoriety during his life. He wrote De aquaeductu urbis Romae, a milestone in two volumes on Roman aqueducts and Strategemata, that is a work in 4 volumes on military strategies.