This document provides background information on icons in Christianity. It discusses the origins and meaning of the word "icon" and cites biblical sources used to support both iconodule and iconoclast positions. It outlines the 8th century Iconoclastic Controversy between those who destroyed images and those who defended them. The document also presents views of John of Damascus, a 8th century monk who wrote extensively in defense of icons. It notes icons were meant to raise the mind to God rather than be substitutes, and discusses terminology around worship and veneration of icons. Examples of modern icon artwork are also presented.