Birth PlaceAccording to tradition, Mary gave birth to Jesus at the place of where the star is located on the floor. The tradition that the birth was in a cave is one of the oldest Christian traditions. Justin Martyr mentions it in the mid-2nd century, as does the Protoevangelium of James (also 2nd c.). Origen notes that the cave of Jesus' birth was pointed out in his day and no doubt this was the same place where the Byzantine church was erected.