A small walk from the Mylapore temple tank towards Chitrakulam will take one to the Vedanta Desikar temple. He is considered as the reincarnation of Divine bell of Lord Vishnu.
The temple is situated very close to Peyalwar temple.
Desikar was a great Acharya who mastered all sastras and became a scholar. He has written thousands of stotras on Lord Srimannarayana.
All Acharyas walked the length and breadth of the country extolling the beauty and grace of Lord but in case of Mylapore temple, Lord Srinivasa with his consort came in search of Desikan ,to be with him.
The main sanctum has Lord Srinivasa's idol ; a beautiful one which would give one a feeling of visiting the Tirumala temple and outside on the left side we can find Lakshmi Hayagreeva and an idol of Desikan in a small shrine.
A detail history of Desikar here
There also shrines for Anjaneyar, Garuda,Peyazhawar,Hayagrivar, Lakshmi Narasimha, Sudarshana and Lord Lakshmi Narasimha and Sri Andal.