In front of the church is a beautiful courtyard. It is especially nice in the spring, when the flowers are in bloom. In the center is a large water vessel, a cantharus, which is ancient. The Romanesque campanile is from the 12th or 13th century. The façade was designed in 1725 by Ferdinando Fuga, who had been commissioned by Francesco Cardinal Acquaviva d'Aragona, titular priest of the church 1709-1724. The cardinal's coat-of-arms is displayed. The columns are ancient, and were installed here in the 12th century. In the mosaic frieze, you can see the heads of Sts Cecilia, her husband Valerianus, her brother-in-law Tiburtius, Pope Urban I and other saints. Several medieval tombs and inscription, as well as fragments of sculpture, can be seen in the walls.