N?g?rjuna is widely considered one of the most important Buddhist philosophers after the historical Buddha. Along with his disciple ?ryadeva, he is credited with founding the Madhyamaka school of Mah?y?na Buddhism. N?g?rjuna is also credited with developing the philosophy of the Praj˝?p?ramit? S?tras and, in some sources, with having revealed these scriptures in the world, having recovered them from the n?gas. Furthermore, he is traditionally supposed to have written several treatises on rasayana alchemy as well as serving a term as the head of N?land? University.