sentences:  After the demise of Alavandar, Srirangam was led by the latter's son Thiruvarangan, however the place lacked the divine touch.According to a legend, Lord Ranganatha himself instructed Mahapurna to go to Kanchi and invite Ramanuja to Srirangam.Alavandar, like Ramanuja, focused both on philosophical debates like dvaita vs. advaita and bhakti prayers and the works attributed to him are in Sanskrit although he codified the heritage of the Tamil Alvars.