Gampopa (1079 - 1153) was the main disciple of the Tibetan yogi Milarepa. In his Jewel Ornament of Liberation, Gampopa combined the mind training methods of the Kadampa tradition with mahamudra teachings on the nature of the mind. The 12 Dagpo Kagyu schools trace from him and his disciple Pagmodrupa.

Image: himalayanart.org