Ramanuja

Also called  Ramanujacarya, or Ilaiya Perumal (Tamil: Ageless Perumal [God])   South Indian Brahman theologian and philosopher, the single most influential thinker of devotional Hinduism. After a long pilgrimage, Ramanuja settled in Srirangam, where he organized temple worship and founded centres to disseminate his doctrine of devotion to the god Vishnu and his consort Sri. He provided an intellectual basis for the practice