12th century, Indian work for Tibetans, Tibetan Teacher with his lineage, stone, 12,8 cm, photo: courtesy of Ulrich von Schroeder, Buddhist Sculptures in Tibet Volume One, Visual Dharma Publications, Hong Kong, p. 383 pl. 122 D, Potala Collection, Lima Lhakhang inventory nº 1552, Lhasa (Tibet).
The central figure is surrounded by (going clockwise from the bottom left corner) Mahakala in his four-arm form, two Indian teachers (mahasiddhas), buddha Vajrasattva, a Tibetan monk, a third mahasiddha, another two Tibetan monks, and a standing female deity, possibly Tara.
Early 12th century, India, Portrait of a Lama and his Lineage, mudstone with polychromy and (cold) gold, inventory nº 992.45.A at the Phoenix Museum (USA).
A simpler version, without Mahakala or the female deity.
Himalayan Buddhist Art - Art Bouddhiste de l'Himalaya 