This icon depicts Abraham sacrificing his son Isaac. It uses the encaustic technique on the marble revetment of the left pilaster supporting the apse of the sanctuary of the Monastery of St. Catherine's main church (Katholikon). Its date is unsure, though probably before the 7th century. Read more: http://www.touregypt.net/featurestories/catherines2-4.htm#ixzz35qFm1JAr
Icon from the Monastery of Saint Katherine (St Catherine) - South Sinai, Egypt.