Catacomb of Santi Gordiano ed Epimaco

Only some of its galleries have been found and excavated - archaeologists believe it to be a much larger necropolis on several levels, with inscriptions from Julian's reign showing it to have still been in use at that date.

[1] The 7th century Notitia ecclesiarum urbis Romae confirms all four were buried there and adds a fifth saint, Trophimus.

Other itineraries add yet more martyrs buried there - Sophia, Sulpicius and Servilian, though evidence on these three is confused and fragmentary.

Further excavations of a semi-demolished building on the surface in 1955 found a square frescoed cubiculum with three arcosolia, now known as cubiculum D, which was saved from total destruction by priest-archaeologist Antonio Ferrua, then director of the Pontificia Commissione di Archeologia Sacra, and contains 350-400 AD frescoes of a seated Christ in majesty flanked by two figures holding the crown of martyrdom (thought to be Gordianus and Epimachus).

Other frescoes in the rest of the complex show Moses receiving the tablets of the law, the resurrection of Lazarus, the fall of man and Susanna and the Elders.