In addition to these icons, others may be added, depending upon custom and space. An icon is a holy image which is the distinctive art form of the Orthodox Church. In actual practice the icon may be a painting of wood, on canvas, a mosaic or a fresco. Icons depict such figures as Christ, Mary the Theotokos, the saints and angels. They may also portray events from the Scriptures or the history of the Church, such as Christmas, Easter, etc.
Icons occupy a very prominent place in Orthodox worship and theology.
The icon is not simply decorative, inspirational, or educational. Most importantly, it signifies the presence of the individual depicted. The icon is like a window which links heaven and earth. When we worship we do so as part of the Church which includes the living and the departed. This belief is expressed every time one venerates an icon or places a candle before it.