I love Thankas. This is a copy of a well-known depiction of the stages of Samatha.
In this painting at bottom the meditator begins with the mind (elephant) leading the meditator which is in turn led by a monkey (as in monkey mind). As time goes on the elephant is tamed, and is led by the meditator, and the monkey goes away. Finally, Enlightenment, followed by Buddhahood, is achieved and the meditator rides the mind. For more: