The icon of St. Peter bears a strong resemblance to the early 6th century encaustic icon in St. Katherine's in Sinai, which shows that some archetypes emerged early and demonstrated remarkable continuity. On the other hand, the Christ as Good Shepherd archetype was rapidly superseded by the image of Christ Pantocrator found in the famous St. Katherine's icon, which in turn seems to have been based on the famous Epitaphion of Edessa. The young, beardless Christ based on Greco-Roman images of Apollo thereafter tended to be used for the pre-incarnational Logos, or, in a very literal manner, for the youthful Jesus.