Mahamudra
Mahamudra (Sanskrit: great seal) is an advanced form of meditation in Buddhism. It is practiced by the Kagyu, Gelug and Sakya schools of Tibetan Buddhism.
The Bön and Nyingma schools practice a different advanced form of meditation called Dzogchen.
Mahamudra Media
Seal design with the word Mahāmudrā ("great seal") in Mongolian 'Phags-pa script
Statue of the Guhyasamāja deity in union with consort (his "mahāmudrā") performing various mudrās (ritual hand gestures).
Painted thanka of Milarepa (1052-1135), Late 19th-early 20th Century, Dhodeydrag Gonpa, Thimphu, Bhutan
Gampopa (1079–1153), Kagyu founder
Wangchuk Dorje (1556–1603), 9th Karmapa, composed various influential texts on Mahamudra.