Complex sentence: He served as the head of the matha in Kumbakonam from 1621 to 1671 and established the "Brindavan" in Mantralayam in the present-day Andhra Pradesh is an important place of pilgrimage.
Split into simpler sentences: He served as the head of the matha in Kumbakonam from 1621 to 1671. His "Brindavan" in Mantralayam in the present-day Andhra Pradesh is an important place of pilgrimage.