Today, April 23, is St George's Day.
Saint George is the brave soldier in the Roman army who slayed (slew?) the Dragon, and here he is in a Miniature from a Passio Sancti Georgii manuscript (Verona, second half of 13th century).
Did he really slay a Dragon? Maybe. It's a good story related to the conflict between light and darkness, good and evil.
The fearsome Dragon demanded human sacrifices and brave Saint George came along just in time to save the princess who had been chosen as the next offering. The King offered George treasures as a reward for saving his daughter, but George gave the wealth to the poor, who were so grateful that they all became Christians. But George was tortured and lost his head during the persecution of Christians in 303AD, thus becoming a Saint.
The warrior Saint George has been the subject of legend since the 7th Century, and became a Patron Saint of the Order of the Garter in 1348. He was promoted to the Patron Saint of England in the middle 1500s. The Cross of St. George (red cross on a white background) is the basis of the Union Jack flag.