Why are the cities of Puhar and Madurai significant in Sangam literature?

Puhar and Madurai are significant in Sangam literature because Puhar was a major port city and Chola capital, known for its trade and prosperity. Madurai was the Pandya capital and the center of the Tamil Sangam assemblies, where much of Sangam literature was composed. Both cities reflect the cultural, political, and economic life of ancient Tamilakam.