Guge was an ancient kingdom in Western Tibet. The kingdom was centered in present-day Zanda County, Ngari Prefecture, Tibet Autonomous Region. At various points in history after the 10th century AD, the kingdom held sway over a vast area including south-eastern Zanskar, Upper Kinnaur district, and Spiti Valley, either by conquest or as tributaries. The ruins of the former capital of the Guge kingdom are located at Tsaparang in the Sutlej valley, not far from Mount Kailash and westwards from Lhasa.