At the cross of Strada Felice (Via Sistina/ Via dlle 4 Fontane) & Strada Pia (Via XX Settembre) Sixtus V Peretti placed 4 fountains depicting the Tiber, the Anio, Juno (3 by Fontana) & Diana (Cortona)
A group of four Renaissance fountains at the intersection of Via dell Fontane and Vie del Quirinale. Also don't forget to visit the nearby Baroque church of Saint Charles at the Four Fountains.