Roughly halfway between the church of Sant’Andrea della Valle and the Tiber River is the Chiesa di San Carlo ai Catinari, a 17th-century church dedicated to Saint Charles Borromeo. San Carlo ai Catinari was built on a Greek Cross plan, with four equal arms radiating out from the central dome rather than one long nave. One of the artistic highlights inside the church is in the Chapel of St. Cecilia, where the dome is illuminated by invisible windows. The stucco decorations in the ceiling, and the musicians who look down from the dome, are delightful. Another noteworthy artistic element is the work of il Domenichino in the pendentives around the base of the dome. The Cardinal Virtues in each painting are not confined by their frames, making them appear more three-dimensional.