Pompeo Frassinelli was a Roman student active in the first half of the 17th century, who passed from Rome to Mantua and finally to Verona, bringing new developments in the field of decorations of caves and gardens and the design of water games, in an ascending parabola that served as fountain, hydraulic engineer, architect, public expert and engineer at Adige. Research, based on archival sources, shed light on a multifaceted character until now almost unknown to local historiography and absolutely unprecedented in the history of Veronese art.