On Ancient Central-Asian Tracks Silk banners of Lokapalas Vasravana and Virudhaka at Tun-huang - Lokapalas in Buddhist theology are the guardians of directions, Warrior kings dressed in armor - one of the two caegories of Dharmapala the other being protectors of wisdom. The Lokapalas are Vaisiravana - He who hears all - north, with pike or halbard and often a snake (or umbrella and mongoose); Dhrtarastra - He who upholds the realm - east with bow and arrow or pipa; Virupaksa - He who sees all - west with sword or pearl; and Virudhaka - He who causes all to grow - south with sword or club - Unfortunately from this photo of a photo we cannot determine all the details.