Two prototypes of icons would be the Christ Pantocrator and the Icon of the Hodegetria. In the West the tradition of icons have been seen as the veneration of "graven images" or against "no graven images" as noted in Exodus 20:4. From the Orthodox point of view graven then would be engraved or carved. Thus this restriction would include many of the ornaments that Moses was commanded to create in the passages right after the commandment was given i.e. the carving of cherubim Exodus 26:1. The commandment as understood by such out of context interpretation would mean "no carved images". This would include the cross and other holy artifacts. The commandment in the East is understood that the people of God are not to create idols and then worship them. It is "right worship" to worship which is of God, which is Holy and that alone.No Graven Image
