The bhavacakra is painted at the entrance of Tibetan monasteries. At the hub, a cock, snake and pig stand for greed, hatred and delusion; around them are the paths up and down, the six realms of rebirth and the twelve links of dependent origination, all held in the jaws of Yama. The Buddha stands outside, pointing to liberation.
Wheel of life
The Tibetan image of saṃsāra: the six realms, the twelve links and the three poisons at the hub, held by Death.
Also: bhavacakra