Even on Internet, not much authentic information was available.
When Sati, attended the yaga no body has cared for her and she felt insulted by the actions of her sisters and parents.
Then when her father started abusing her husband she could not control her feelings and scarified herself at the place of yagna by creating agni from earth with her right thumb of her foot.
The Tamil saying Kanchi Kamakshi, Madurai Meenakshi and Kaasi Visalakshi illustrates the importance of the Shakthi shrine that it is.
Ekambreswarar temple, the Kamakshiamman Temple and the Kumara Kottam temple and the Ulagalanda Perumaal Temple are the primary shrines in Periya Kanchipuram.
The Kailasanathar temple here is one of the grand Pallava monuments.