These are the principal Upanishads which are the earliest and most important in the tradition of Vedanta philosophy. There are 10 Mukhya Upanishads which include the Brihadaranyaka, Chandogya, Aitareya, Taittiriya, Mundaka, Mandukya, Prashna, Isa, Katha and Shvetashvatara Upanishads.