dragon, but holding a draco standard. One of the Vinica icons also has the oldest representation of Saint George with a dragon: George stands besides a cynocephalous St. Christopher, both saints treading on snakes with human heads, and aiming at their heads with spears. Maguire (1996) has connected the shift from unnamed equestrian heroes used in household magic to the more regulated iconography of named saints to the closer regulation of sacred imagery following the iconoclasm of the 730s. In the West, a Carolingian-era depiction of a Roman horseman trampling and piercing a dragon between two soldier saints with lances and shields was put on the foot of a crux gemmata, formerly in the Treasury of the Basilica of Saint Servatius in Maastricht (lost since the 18th c.). The representation survives in a 17th-century drawing, now in the Bibliothèque Nationale de France in Paris. The "Christianisation" of the Thracian horseman iconography can be traced to the Cappadocian cave churches of Göreme, where frescoes of the 10th century show military saints on horseback confronting serpents with one, two or three heads. One of the earliest examples is from the church known as Mavrucan 3 (), generally dated to the 10th century, which portrays two "sacred riders" confronting two serpents twined around a tree, in a striking parallel to the Dioskuroi stela, except that the riders are now attacking the snake in the "tree of life" instead of a boar. In this example, at least, there appear to be two snakes with separate heads, but other examples of 10th-century Cappadocia show polycephalous snakes. A poorly preserved wall-painting at the ("Snake Church") that depicts the two saints Theodore and George attacking a dragon has been tentatively dated to the 10th century, or alternatively even to the mid-9th. A similar example, but showing three equestrian saints, Demetrius, Theodore and George, is from the "Zoodochos Pigi" chapel in central Macedonia in Greece, in the prefecture of Kilkis, near the modern village of Kolchida, dated to the 9th or 10th century. A 12th-century depiction of the mounted dragon-slayer, presumably depicting Theodore, not George, is found in four muqarna panels in the nave of the Cappella Palatina in Palermo. Transfer to Saint George The dragon motif was transferred to the George legend from that of his fellow soldier saint, Saint Theodore Tiro. The transfer of the dragon iconography from Theodore, or Theodore and George as "Dioskuroi" to