Annamacharya was a 15th-century Hindu saint and is the earliest known Indian musician to compose songs called sankirtanas in praise of the god Venkateswara, a form of Vishnu. He is the first known composer in Carnatic music. Other composers like Purandaradasa came after him. The musical form of the keertana songs that he composed, which are still popular among Carnatic music concert artists, have strongly influenced the structure of Carnatic music compositions. Annamacharya is remembered for his saintly life and is honored as a great devotee of Vishnu by devotees and saintly singers.