Shankaracharya (Sanskrit: शङ्कराचार्य, IAST: Śaṅkarācārya, "Shankara-acharya") is a religious title used by the heads of amnaya monasteries called mathas in the Advaita Vedanta tradition of Hinduism. The title derives from Adi Shankara; teachers from the successive line of teachers retrospectively dated back to him are known as Shankaracharyas.