Adi Shankara was an early 8th century Indian philosopher and theologian who consolidated the doctrine of Advaita Vedanta.He is credited with unifying and establishing the main currents of thought in Hinduism. He is also known as Adi Shankaracharya, Shankara Bhagavatpada, sometimes spelled as Sankaracharya, (Ādi) Śaṅkarācārya, Śaṅkara Bhagavatpāda and Śaṅkara Bhagavatpādācārya..
His works in Sanskrit discuss the unity of the ātman and Nirguna Brahman “brahman without attributes”. He wrote copious commentaries on the Vedic canon (Brahma Sutras, Principal Upanishads and Bhagavad Gita) in support of his thesis. His works elaborate on ideas found in the Upanishads.
Adi Shankara traveling widely within India, Gujarat to Bengal, and participating in public philosophical debates with different orthodox schools of Hindu philosophy, as well as heterodox traditions such as Buddhists, Jains, Arhatas, Saugatas, and Carvakas. During his tours, he is credited with starting several Matha (monasteries), however this is uncertain. Ten monastic orders in different parts of India are generally attributed to Shankara’s travel-inspired Sannyasin schools, each with Advaita notions, of which four have continued in his tradition: Bharati (Sringeri), Sarasvati (Kanchi), Tirtha and Asramin (Dvaraka). Other monasteries that record Shankara’s visit include Giri, Puri, Vana, Aranya, Parvata and Sagara – all names traceable to Ashrama system in Hinduism and Vedic literature.
Adi Sankara is believed to have died aged 32, at Kedarnath in the northern Indian state of Uttarakhand, a Hindu pilgrimage site in the Himalayas. Texts say that he was last seen by his disciples behind the Kedarnath temple, walking on the Himalayas until he was not traced. Some texts locate his death in alternate locations such as Kanchipuram (Tamil Nadu) and somewhere in the state of Kerala.