In heraldry, Saint George's Cross is a red cross on a white background, which from the Late Middle Ages became associated with Saint George, the military saint, often depicted as a crusader.
Miniature of Saint George and the Dragon, ms. of the Legenda Aurea, dated 1348 (BNF Français 241, fol. 101v.)
Saint George as a crusader knight, miniature from a ms. of Vies de Saints, c. 1310 (Bibliothèque Sainte-Geneviève, Ms. 588)
Miniature of Saint George and the Dragon, ms. of the Legenda Aurea, Paris, 1382 (BL Royal 19 B XVII, f. 109).
Saint George with an earl of Lancaster (probably Edmund Crouchback), from an English Book of Hours, c. 1330.
A number of cross symbols were developed for the purpose of the emerging system of heraldry, which appeared in Western Europe in about 1200. This tradition is partly in the use of the Christian cross an emblem from the 11th century, and increasingly during the age of the Crusades. Many cross variants were developed in the classical tradition of heraldry during the late medieval and early modern periods. Heraldic crosses are inherited in modern iconographic traditions and are used in numerous national flags.
9th-century Byzantine seal showing a patriarchal cross (seal of Niketas, commander of the Byzantine imperial fleet)
Seal of Bouchard de Marly (attested 1225), a cross, quarterly four alerions
Seal of Amadeus V, Count of Savoy (1249–1323), showing a knight on horseback displaying the Savoy cross on his shield, ailets (shoulder-pads) and caparison (horse covering)
A section of Segar's Roll, a 17th-century copy of a late 13th-century English roll of arms. Crosses are shown on the arms of: the legendary Prester John (attributed arms showing a full crucifix including the figure of Christ), the King of Jerusalem (the Jerusalem cross), the Emperor of Constantinople (the Palaiologos dynasty emblem with the Betas interpreted as crescents), the "King of Greece", and King Edward the Confessor of England (attributed arms showing a cross and five martlets).
