St. Catherine’s Monastery, Mount Sinai. Credit: patano/wikimediamcommons The Greek Orthodox Holy Monastery of St. Catherine on Mount Sinai is believed to house the oldest icon depicting the crucifixion of Christ. St. Catherine’s icon of the crucifixion of Christ The icon in question, a panel painting, features the crucified Messiah, with arms stretched over the wooden beams of the cross, surrounded by several figures from the crucifixion narrati…