Italian architect and sculptor. The protection of the Borghese family, in particular Pope Paul V, who nominated Ponzio the architect of the Vatican Palaces, assured him a great number of commissions for important architectural projects: enlarging of the Palazzo Borghese (1605-1607); Casino di Villa Borghese (1609-1613); Cappella Paolina in Santa Maria Maggiore (1605-1611); fountain Acqua Paola on the Janiculum (1610, in collaboration with Giovanni Fontana [1540-1614]); and the church San Sebastiano (1612, finished by Giovanni Vasanzio). //