The dragon is a mythical beast and a symbol found in many cultures. It may be associated with good luck, fortune and wisdom, or bad luck, elemental evil and heresy. Carl Jung believed that the dragon was a symbol of universal unconscious, since so many cultures have myths associated with the dragon or dragon-like creatures.
Dragons in European culture were often thought of as evil. In legends like St. George and the Dragon, the dragons were cruel. They were, also, not necessarily large, and some were smaller than butterflies. However, they were usually very intelligent.
Chinese dragons are viewed as good luck and are associated with power. They are a sign of the Chinese zodiac and are thought to influence the weather and tides. They were also often associated with royalty and many emperors used dragons as part of their crests.
Vietnamese dragons are very interesting. According to old Vietnamese legends, all people are descended from dragons.