 The church has a Romanesque campanile.On the south side of the nave is the funerary monument Eleonora Boncompagni Borghese of 1693, to a design of Giovan Contini Batiste, and in the south transept the Chapel of Charles IV of Spain, with the icon "Madonna di sant'Alessio", an Edessa icon of the Intercession of the Madonna dating from the 12-13th centuries, thought to have been painted by St Luke the Evangelist and brought from the East by St Alexius.The church also contains the tombstone of Peter Savelli (of the same family as Pope Honorius III).