In the legends about the German Emperor Frederick Barbarossa, depicting him as sleeping along with his knights in a cave in the Kyffhäuser mountain in Thuringia or the Untersberg in Bavaria, it is told that when the ravens cease to fly around the mountain he will awake and restore Germany to its ancient greatness. According to the story, the Emperor's eyes are half closed in sleep, but now and then he raises his hand and sends a boy out to see if the ravens have stopped flying.