Viharas were for the purpose of living, Chaityas were assemblies for the purpose of discussions. Further, Chaityas were with Stupas, Viharas did not have stupas.
The narrative texts of the Sangam literature are called Melkannakku. These are 18 major works consisting of eight anthologies and ten idylls. They are considered the works of heroic poetry in which heroes are glorified and perpetual wars and cattle raids during that time are frequently mentioned.
EXAMIANS