What is "tyagaraja"

Kakarla Tyagabrahmam (4 May 1767 – 6 January 1847) or Saint Tyagaraja, also known as Tyāgayya in Telugu , was one of the greatest composers of Carnatic music or Indian classical music. He was a prolific composer and highly influential in the development of the classical music tradition. Tyagaraja composed thousands of devotional compositions, most in Telugu and in praise of Lord Rama, many of which remain popular today. Of special mention are five of his compositions called the Pancharatna Kritis (English: "five gems"), which are often sung in programs in his honour.