The Vaishnava Upanishads are minor Upanishads of Hinduism, related to Vishnu theology (Vaishnavism). There are 14 Vaishnava Upanishads in the Muktika anthology of 108 Upanishads. They, along with other minor Upanishads, are generally classified separate from the thirteen major Principal Upanishads considered to be more ancient and from the Vedic tradition. These Upanishads propound Vishnu, Narayana, Rama or one of his avatars as the supreme metaphysical reality called Brahman in Hinduism. They discuss a diverse range of topics, from ethics to the methods of worship.