The Tamil Sangams or Cankams were assemblies of Tamil scholars and poets that, according to traditional Tamil accounts, occurred in the remote past. Scholars believe that these assemblies were originally known as kooṭam or “gathering,” which was also a name for Madurai. Three assemblies are described. The legend has it that the first two were held in cities since “taken by the sea”, and the third was held in the present-day city of Madurai. […]
In contemporary versions of the legend, the cities where the first two Sangams were held are said to have been located on Kumari Kandam, a fabled lost continent, that lay to the South of mainland India, and which was described as the cradle of Tamil culture.
Kumari Kandam supposedly lay south of present-day Kanyakumari District and, according to these legends, was seized by the sea in a series of catastrophic floods.
Source: Tamil Sangams – Wikipedia