A very important symbol in Buddhism, in fact, it is the center of their belief. They are here on earth to do good deeds to win enough merit to achieve nirwana. If nirwana is not achieved, they will come back to this life in one form or another and the cycle goes on until nirwana is finally achieved. The wheel identifies good and bad behaviour. There is always a wheel of rebirth on the outside of every Tibetan Buddhist temple. It is also called 'bhavacakra.'