Query: Deshin Shekpa was the head of what school?
Context: Others argue that the significant religious nature of the relationship of the Ming court with Tibetan lamas is underrepresented in modern scholarship. In hopes of reviving the unique relationship of the earlier Mongol leader Kublai Khan (r. 1260–1294) and his spiritual superior Drogön Chögyal Phagpa (1235–1280) of the Sakya school of Tibetan Buddhism, the Yongle Emperor (r. 1402–1424) made a concerted effort to build a secular and religious alliance with Deshin Shekpa (1384–1415), the Karmapa of the Karma Kagyu school. However, the Yongle Emperor's attempts were unsuccessful.