The Jokhang Temple was built on the former site of a lake. According to the legend, every time a temple was built, it would collapse. Confused by this phenomenon, the kings ask to Avalokitesvara (the merci god) for help. He told the them that in the geography of Tibet lie down a dragon with the lake at the heart. In order to build the temple, he advised they must destroy the dragon by filling and leveling the lake using 1,000 goats to carry soil from a mountain far away.