The earliest body of Tamil literature (roughly 300 BCE to 300 CE), composed at assemblies (sangams) of poets said to have been held under the patronage of the Pandya rulers at Madurai, the main source for the Sangam Age of South India.
Author-to-text matching (Ilango Adigal, Sittalai Sattanar, Tiruvalluvar), the three southern kingdoms with their emblems, and Madurai as the Pandya seat are recurring Sangam-age facts.
Silappadikaram (by Ilango Adigal) versus Manimekalai (by Sittalai Sattanar); the Sangam Age is roughly contemporary with the post-Mauryan north, not the Gupta age.
Earliest Tamil literature from Madurai assemblies; Tolkappiyam, the twin epics, and the kingdoms of Chera, Chola, and Pandya.