Villa Aldobrandini is one of the most important villas in Frascati. It stands on a panoramic hill overlooking the entrance to the city and boasts a centuries-old history. Built for the cardinal Pietro Aldobrandini, nephew of Pope Clement VIII, it was completed in 1602 by architects Giacomo della Porta, Carlo Maderno and Giovanni Fontana. Teatro delle Acque, by Carlo Maderno and Orazio Olivieri are of particular value. Inside the villa there are frescoes by Cavalier d'Arpino and Domenichino, in Sala del Parnaso. Monumental entrance is the work of the architect Carlo Francesco Bizzaccheri, of the eighteenth century.