Ancient Tamilakam refers to the Sangam period territory of southern India between the 3rd century BCE and 4th century CE. Megalithic monuments from this period include urn burials marked with large stones, as well as structures like stone circles, dolmens, cists, rock chambers, tomp stones, and menhirs. Archaeological findings at these sites have uncovered iron tools, pottery, beads and other artifacts that provide insight into the history and Iron Age culture of ancient Tamilakam. Numerous megalithic sites have been discovered across southern India, including at locations like Kodumanal, Alagarai, and Thirukambaliyoor.