Drogön Chögyal Phagpa (འགྲོ་མགོན་ཆོས་རྒྱལ་འཕགས་པ། 'gro mgon chos rgyal 'phags pa Drogön Chögyel Pakpa; आर्यमतिध्वज - Āryamatidhvaja, formally Lodrö Gyaltsen - བློ་གྲོས་རྒྱལ་མཚན། blo gros rgyal mtshan Lodrö Gyeltsen), universally revered across Tibet, Mongolia, China, and the Himalayas as the fifth and final of the Five Founding Masters of the Sakya school (Sakya Gongma Nga) and the supreme Imperial Preceptor (Dishi) of the Mongol Yuan Empire, stands as one of the most consequential spiritual statesmen, scholars, and tantric masters in Buddhist history. Flourishing during the 13th century, with his year of birth in 1235 and his year of death in 1280, Drogön Chögyal Phagpa was born into the illustrious Khön clan in southern Tibet to his father, Zangtsa Sonam Gyaltsen, and his mother, Machik Kunga Kyid. Recognized in early childhood as a joint emanation of Manjushri Bodhisattva and Avalokiteshvara Bodhisattva, he exhibited miraculous memory and oratorical brilliance—teaching complex sutras at age eight—before taking formal refuge in the Buddha, the Dharma, and the Sangha, practicing fearless renunciation, and accompanying his renowned uncle Sakya Pandita (1182–1251) on his historic journey to the Mongol court at Liangzhou in 1244.
At Liangzhou, young Drogön Chögyal Phagpa studied tirelessly under Sakya Pandita, mastering the entire exoteric Tripitaka, Abhidharma, Madhyamaka dialectics, Yogacara phenomenology, epistemological logic derived from Dignaga and Dharmakirti, Sanskrit grammar, and the complete esoteric lineages of the Sakya tradition. Shortly before passing into parinirvana in 1251, Sakya Pandita conferred upon the sixteen-year-old Drogön Chögyal Phagpa his Dharma conch, begging bowl, and full spiritual authority as head of the Sakya school, after which Drogön Chögyal Phagpa received full monastic ordination in the Mulasarvastivada Vinaya Pitaka lineage in 1255 under Tshalpa Kunga Dorje and Dampa Kunga Drak, upholding strict adherence to monastic precepts and ethical conduct.
In 1253, at the invitation of Prince Kublai Khan—grandson of Genghis Khan and future founder of the Yuan dynasty—Drogön Chögyal Phagpa traveled to the Mongol imperial encampment in northern China. Engaging in profound philosophical dialogues and demonstrating unmatched spiritual authority, Drogön Chögyal Phagpa triumphed in a landmark 1258 imperial debate at Shangdu (Xanadu) over Daoist polemicists, proving the authenticity of Shakyamuni Buddha's teachings on dependent origination, anatta, and emptiness. Deeply impressed, Kublai Khan and Empress Chabi took formal refuge in the Triple Gem, requested the complete Abhisheka consecrations of the Hevajra Tantra (Toh Number 417 in the Tibetan Tripitaka and Taisho Number 892 in the Chinese Tripitaka), and inaugurated the formal Priest-Patron (Chö-Yön) alliance wherein Kublai Khan sat on a lower throne while receiving Dharma teachings while Drogön Chögyal Phagpa guided the emperor's spiritual life.
When Kublai Khan ascended the throne as Great Khan and Emperor of the Yuan dynasty in 1260, he appointed Drogön Chögyal Phagpa as State Preceptor (Guoshi) and subsequently as Imperial Preceptor (Dishi), granting him supreme spiritual and administrative authority over all thirteen myriarchies of Tibet (Ü-Tsang, Kham, and Amdo). Utilizing his immense imperial influence with extraordinary wisdom, compassion, and skillful means, Drogön Chögyal Phagpa unified Tibet after centuries of political fragmentation, spared the Tibetan populace from Mongol military devastation, abolished capital punishment and harsh levies across Tibet, and protected all Buddhist schools—including the Nyingma, Kagyu, and Kadampa traditions—without sectarian bias.
Among Drogön Chögyal Phagpa's most celebrated cultural and linguistic achievements was his creation in 1269, at the request of Kublai Khan, of the famous Phagpa Script (ཧོར་ཡིག་གསར་པ། hor yig gsar pa Hor-yik Sarpa, Square Script). Designed as a unified phonetic alphabet derived from Tibetan and Sanskrit orthographic principles to transcribe Mongolian, Chinese, Tibetan, Uyghur, and Sanskrit across the vast Eurasian Mongol Empire, the Phagpa Script became the official imperial script of the Yuan dynasty and facilitated the translation of major Buddhist scriptures into Mongolian and Chinese.
In the literary and doctrinal sphere, Drogön Chögyal Phagpa composed an extraordinary twenty-volume collected works (Sungbum) covering Madhyamaka philosophy, Abhidharma, Vinaya Pitaka ethics, Vajrayana Tantra commentaries, and royal statecraft. His most famous philosophical and pedagogical treatise is the Sheja Rabsal (ཤེས་བྱ་རབ་གསལ། shes bya rab gsal Shayja Rabsel; Clarification of the Knowable Objects), composed in 1278 for Crown Prince Zhenjin (Jimgim), which was translated into the Chinese Tripitaka as the Zhangsuo Zhilun (彰所知論, Taisho Number 1645) and became the primary textbook introducing Buddhist cosmology, karma, rebirth, anicca, dukkha across the six realms, the Four Noble Truths, and the Noble Eightfold Path to the Mongol and Chinese imperial courts.
Philosophically and contemplatively, Drogön Chögyal Phagpa upheld the core Sakya Lamdre (Path with its Result) lineage descended from Virupa, Sachen Kunga Nyingpo, Sonam Tsemo, Jetsün Drakpa Gyaltsen, and Sakya Pandita, teaching the inseparability of samsara and nirvana (འཁོར་འདས་དབྱེར་མེད། khor 'das dbyer med Khor-day Yermay). Harmonizing the rigorous Madhyamaka dialectics of Nagarjuna, Aryadeva, and Candrakirti regarding emptiness (शून्यता - śūnyatā; སྟོང་པ་ཉིད། stong pa nyid Tongpanyid) and dependent co-arising with the luminous Buddha-nature (tathagatagarbha) teachings of Maitreya's Uttaratantra Shastra (Toh Number 4024 and Taisho Number 1611) and the Chakrasamvara Tantra (Toh Number 368) and Guhyasamaja Tantra (Toh Number 442 and Taisho Number 885), he guided practitioners to uproot the three poisons of greed, hatred, and delusion, dissolve attachment to the five aggregates and emptiness of self, and cultivate loving-kindness, generosity, merit, equanimity, and bodhicitta.
Returning triumphantly to his ancestral seat of Sakya Monastery in Tibet in 1276, where he convened the historic Great Dharma Council of Chumik (1277) uniting seventy thousand monastics from across the snowland in peaceful study and meditation, Drogön Chögyal Phagpa passed into final parinirvana at Sakya Monastery in 1280 at the age of forty-five amidst extraordinary miraculous displays and rainbow canopies. Leaving an enduring legacy that linked the spiritual heritage of Tibet with Mongolia and East Asia for centuries, Drogön Chögyal Phagpa stands forever alongside Padmasambhava, Atisha, Longchenpa, Tsongkhapa, and Sakya Pandita as a supreme architect of the Middle Way and full awakening.