St George and the Dragon.

The story of Saint George and the Dragon. Long ago, in the country of Libya, there was a city called Siliene.  One day, a huge and powerful Dragon made its nest in a spring, which is where the people of Siliene used to go to fetch water.  With the Dragon being in the spring, the people could only get water if they could get the Dragon to move.  Now Dragons have a huge appetite, which means they eat a lot.  So to get the Dragon to move, the people of Siliene would offer the Dragon a sheep.  When the Dragon moved to eat the sheep, the people would hurriedly get water and leave, in case the Dragon was still hungry. In the story the dragon is a metaphor for the devil. Who was Saint George?