Maduranthakam

1. Ramanuja left Kanchipuram for Srirangam to meet Peria Nambi, because Lord Varadaraja of Kanchipuram had instructed him to seek instruction from Peria Nambi. 
2. In the meanwhile, Peria Nambi himself had set forth for Kanchipuram from Srirangam. 
3. The two met at Madurantakam, and Ramanuja asked Peria Nambi to teach him. 

Peria Nambi said they should go either to Kanchi or to Srirangam, before he would teach Ramanuja. But Ramanuja asked, “What if my worldly life were to end before we reach either of these two places? So teach me here.” Peria Nambi then taught Ramanuja in Madurantakam.

http://rahasyathrayasaaram.blogspot.com/
https://en.wikipedia.org/wiki/Maduranthakam