Also known as the Sakya clan, the Khon clan came into existence around the end of the Yarlung dynasty. The Khon developed the Sakya tradition in the eleventh century in the place called Sakya due to the pale soil of the valley. Khon Konchok Gyelpo built what later developed into Sakya Monastery in 1073. His great-grandson Sakya Pandita Kunga Gyeltsen was regarded as the greatest scholar of his age. Kunga Gyeltsen's nephew Pakpa Lodro Gyeltsen became Imperial Preceptor under Khubilai Khan and instituted Mongol rule in Tibet, based at Sakya, that lasted until the collapse of the Yuan Dynasty in the fourteenth century. The Khon clan continues to control the Sakya tradition and Sakya Monastery.