The Renaissance façade, one of the first in this style, is built in travertine said to be from the ruins of the Colosseum. It was designed by Giacomo di Pietrasanta from the late 15th century. The balustrade on the stairs was added in the 18th or 19th century. façade has two levels, divided by a trapezoidal strip. The façade is similar to that of Santa Maria del Popolo, which was designed by the same architect.