It has splendid marble paving and, etched in the wall of one of the smaller rooms, a controversial croseregarded by some as one of the oldest Christian relics, though others insist the emblem was not adopted until the conversion of Constantine three centuries later.
Christian relics usually have marble paving.
mnli hypothesis: Christian relics usually have marble paving. premise: It has splendid marble paving and, etched in the wall of one of the smaller rooms, a controversial croseregarded by some as one of the oldest Christian relics, though others insist the emblem was not adopted until the conversion of Constantine three centuries later.