Vellayi Gopuram (white Temple Tower) of Srirangam
1323 CE.During the Tamil month of Vaikasi, the armies of the Delhi Sultanate assaulted Srirangam. Approximately 12,000 people who lived on Srirangam island gave their lives in defense of the temple. The gems belonging to Lord Ranganatha and the Temple's wealth were plundered during the soldiers' onslaught on the premises. The barbarian troops also desired to take possession of Lord Vishnu's murti. While they looked for the murti (deity), they discovered that Pillailokacharya, a Vaishnavite acharya, had taken it and fled to Madurai. (The Namperumal murti of Lord Vishnu, which departed Srirangam in 1323 during the Delhi Sultanate invasion, did not return until 1371).
The Sultanate forces executed the Temple officials after failing to find the deity and then began a major search for the Namperumal deity and Pillailokacharya.
A temple dancer named Vellayi staged a dance in front of the military commander, because of fear that the Acharya and the idol would fall in the hands of these barbarians. This gave Pillailokacharya more time to flee with the deity. After hours of continuous dancing, she led the commander to the eastern Gopuram and shoved him down. After killing him, Vellayi chanted the name of Ranganathar as she leaped to her death from the tower of the eastern gateway.
The tower was named after Vellayi by Kempanna, the Chief of the Vijayanagara Army, who drove away the soldiers of the Sultanate much later, in honour of her sacrifice. She is still remembered at Srirangam. The Gopuram is white in remembrance of her sacrifice , and it is now known as Vellayi Gopuram.