Thangka, also known as tangka, thanka or tanka is a painting on cotton, or silkapplque, usually depicting a Buddhist deity, scene, or mandala of some sort. The thangka is not a flat creation like an oil painting or acrylic painting but consists of a picture panel which is painted or embroidered over which a textile is mounted and then over which is laid a cover, usually silk. Generally, thangkas last a very long time and retain much of their lustre, but because of their delicate nature, they have to be kept in dry places where moisture will not affect the quality of the silk. It is sometimes called a scroll-painting.

Thangka, when created properly, perform several different functions. Images of deities can be used as teaching tools when depicting the life (or lives) of the Buddha, describing historical events concerning important Lamas, or retelling myths associated with other deities. Devotional images act as the centerpiece during a ritual or ceremony and are often used as mediums through which one can offer prayers or make requests. Overall, and perhaps most importantly, religious art is used as a meditation tool to help bring one further down the path to enlightenment.