A thangka is a painting on cotton or silk, often embroidered over in many layers. Thangkas were used as teaching tools, often depicting the life of Buddha, lamas or other deities and bodhisattvas. They also served as important apparatus in meditation which would lead one closers to a transformative enlightenment.
This particular thangka is from Tibet and depicts Yamantaka with a crown of skulls, surrounded by flames. In his right hand he holds a flaying knife and in his left, a skullcap. He wears a tiger skin and is trampling a man. Along the base are eight black and dark blue members of his retinue.