Icons

Main Entry: icon
Variant(s): also ikon
Function: noun
Etymology: Latin, from Greek eikōn, from eikenai to resemble
Date: 1572
1 : a usually pictorial representation : image
2 [Late Greek eikōn, from Greek] : a conventional religious image typically painted on a small wooden panel and used in the devotions of Eastern Christians
3 : an object of uncritical devotion : idol
4 : emblem, symbol (icon of 1960's residential architecture — Paul Goldberger)
5 a : a sign (as a word or graphic symbol) whose form suggests its meaning b : a graphic symbol on a computer display screen that usually suggests the type of object represented or the purpose of an available function

— icon·ic \ī-ˈkä-nik\ adjective

— icon·i·cal·ly \-ni-k(ə-)lē\ adverb

References 
Lascaux
Byzantine Icon
Shepard Fairey video
Shepard Fairey's work
Andy Warhol
Vik Muniz