 The central group of the Sarcophagus of Junius Bassus of 359 (Vatican) is the earliest example with a clear date.In some cases Christ hands a scroll to St Peter on his right, imitating a gesture often made by Emperors handing an Imperial decree or letter of appointment to an official, as in ivory consular diptychs, on the Arch of Constantine, and the Missorium of Theodosius I.This depiction is known as the Traditio legis ("handing over the law"), or "Christ the lawgiver" – "the apostles are indeed officials, to whom the whole world is entrusted" wrote Saint John Chrysostom.