
15th century, Tibet, 1st king of Tibet (of the Tibetan empire?), gilt bronze, private collection, photo by Nagel https://www.auction.de/highlights_717_e.php.
Like most images of Songtsen Gampo, 33rd king of Tibet and founder of the Tibetan empire, this personage wears a turban shaped like a truncated cone topped with Amitabha’s head. He is seated on an antelope skin over a cushion atop a throne decorated with a visvajra at the front and holds a long-life vase in his left hand.

Undated, Tibet, Songtsen Gampo, at the Potala, photo by Ernst Krause, suggested by Matt, a reader of this blog, published on https://commons.wikimedia.org/wiki/File:Bundesarchiv_Bild_135-KA-07-057,_Tibetexpedition,_Statue_im_Potala.jpg.

19th century, Tibet, Songtsen Gampo, copper alloy with cold gold, pigments and turquoise, private collection, photo by Sotheby’s
Sculptures of Tibetan kings are so rare that even fairly recent ones have a place in this post. On both images he is seated on two square cushions covered with an antelope skin and wears a necklace with a very large amulet box.
16th century, Tibet, probably King Kunzang Nyida Drakpa, gilt copper alloy with silver inlaid eyes, private collection, photo by on Bonhams
According to an inscription on the base, this is probably a portrait of Kunzang Nyida Drakpa made during his life time. The king appears as a mahasiddha, seated on a tiger skin and adorned with the usual bone jewellery, cross-belt and spiral earrings, holding a vajra sceptre and a long-life vase.

17th-18th century, Tibet, King Lha Thothori Nyanshal, 28th king of Tibet, bronze with lacquer and gilding, private collection, photo by Jacques How Choong.
An inscription on the base identifies this king, about whom very little is known.