The Sakya, the Grey Earth school, was founded by Khön Könchok Gyelpo (Wylie: 'khon dkon mchog rgyal po , 1034–1102), a disciple of the great Lotsawa, Drogmi Shākya (Wylie: brog mi lo tsā wa ye shes ). It is headed by the Sakya Trizin, traces its lineage to the mahasiddha Virūpa,[17] and represents the scholarly tradition. A renowned exponent, Sakya Pandita (1182–1251CE), was the great-grandson of Khön Könchok Gyelpo.