A maţha (also written matha and mutt) is a term for monastic and similar religious establishments of the Hindu religion. A maţha is usually more formal, hierarchical, and rule-based than an ashram. The oldest such institutions follow the Advaita tradition, where the head of a maţha is often called a Shankaracharya, a title derived from Ādi Śankara.
Important establishments include the four Āmnāya maţhas:
Other Hindu religious traditions also have their own mathas, such as,