Macedonian workshop - St George the dragon-slayer on horseback - Google Art Project

Saint George and the Dragon 

Public domain photograph of Byzantine style Orthodox icon, free to use, no copyright restrictions image - Picryl description

St. George Conquering the Dragon is a popular subject in Christian art, representing the victory of good over evil. St. George is a Christian martyr who is venerated as a saint in the Catholic, Orthodox, and Anglican Churches. In this scene, St. George is depicted as a brave and fearless warrior who is defeating a dragon, which represents evil.