Pre-historic period
Possible evidence indicating the earliest presence of Tamil people in modern day Tamil Nadu are the megalitic urn burials, dating from around 1500 BCE and onwards, which have been discovered at various locations in Tamil Nadu, notably in Adichanallur in Tirunelveli District which conform to the descriptions of funerals in classical Tamil literature.
Various legends became prevalent after the 10th century CE regarding the antiquity of the Tamil people. According to Iraiyanar Agapporul, a 10th/11th century annotation on the Sangam literature, the Tamil country extended southwards beyond the natural boundaries of the Indian peninsula comprising 49 ancient nadus (divisions). The land was supposed to have been destroyed by a deluge. The Sangam legends also added to the antiquity of the Tamil people by claiming tens of thousands of years of continuous literary activity during three Sangams.
Classical period
From around the 3rd century BCE onwards, three royal dynasties—the Cholas, the Cheras and the Pandyas—rose to dominate the ancient Tamil country. Each of these dynasties had its own realm within the Tamil-speaking region. Classical literature and inscriptions also describe a number of Velirs, or minor chieftains, who collectively ruled over large parts of central Tamil Nadu.Wars between the kings and the chieftains were frequent, as were conflicts with ancient Sri Lanka. These wars appear to have been fought to assert hegemony and demand tribute, rather than to subjugate and annex those territories. The kings and chieftains were patrons of the arts, and a significant volume of literature exists from this period. The literature shows that many of the cultural practices that are considered peculiarly Tamil date back to the classical period.Agriculture was important during this period, and there is evidence that irrigation networks were built as early as 2nd century AD.Internal and external trade flourished, and evidence exists of significant contact with Ancient Rome.Large quantities of Roman coins and signs of the presence of Roman traders have been discovered at Karur and Arikamedu. There is also evidence that at least two embassies were sent to the Roman Emperor Augustus by Pandya kings.Potsherds with Tamil writing have also been found in excavations on the Red Sea, suggesting the presence of Tamil merchants there. An anonymous 1st century traveler's account written in Greek, Periplus Maris Erytraei, describes the ports of the Pandya and Chera kingdoms in Damirica and their commercial activity in great detail. Periplus also indicates that the chief exports of the ancient Tamils were pepper, malabathrum, pearls, ivory, silk, spikenard, diamonds, sapphires, and tortoiseshell.
The classical period ended around the 4th century AD with invasions by the Kalabhra, referred to as the kalappirar in Tamil literature and inscriptions. These invaders are described as evil kings and barbarians coming from lands to the north of the Tamil country. This period, commonly referred to as the Dark Age of the Tamil country, ended with the rise of the Pallava dynasty. According to Clarence Maloney, during the classical period Tamils also settled the Maldive Islands.
Imperial and post-imperial periods
Although the Pallava records can be traced from the 2nd century AD, they did not rise to prominence as an imperial dynasty until the 6th century. The dynasty does not appear to have been Tamil in origin, although they rapidly adopted the local culture and the Tamil language. The Pallavas sought to model themselves after great northern dynasties such as the Mauryas and Guptas. They therefore transformed the institution of the kingship into an imperial one, and sought to bring vast amounts of territory under their direct rule. The Pallavas were followers of Hinduism, though for a short while one of their kings embraced Jainism and later converted to Hinduism. The Bhakti movement in Hinduism was founded by Tamil saints at this time, and rose along with the growing influence of Jainism and Buddhism. The Pallavas pioneered the building of large, ornate temples in stone which formed the basis of the Dravidian temple architecture.
The Pallava dynasty was overthrown in the 9th century by the resurgent Cholas. The Cholas become dominant in the 10th century and established an empire covering most of southern India and Sri Lanka. The empire had strong trading links with China and Southeast Asia. The Cholas' navy conquered the South Asian kingdom of Sri Vijaya in Sumatra and continued as far as Thailand and Burma. Chola power declined in the 12th and 13th centuries, and the Pandya dynasty enjoyed a brief period of resurgence thereafter during the rule of Sundara Pandya. However, repeated Muslim invasions from the 15th century onwards placed a huge strain on the empire's resources, and the dynasty came to an end in the 16th century.
The western Tamil lands became increasingly politically distinct from the rest of the Tamil lands after the Chola and Pandya empires lost control over them in the 13th century. They developed their own distinct language and literature, which increasingly grew apart from Tamil, evolving into the modern Malayalam language by the 15th century.
Tamils in Sri Lanka
There is little scholarly consensus over the presence of the Tamil people in Sri Lanka, prior to the medieval Chola period (c. 10th century AD). One theory states that there was not an organized Tamil presence in Sri Lanka until the invasions from what is now South India in the 10th century AD; another theory contends that Tamil people were the original inhabitants of the island. Yet according to another theory cultural diffusion, rather than migration of people, spread the Sinhalese and Tamil languages from peninsular India into an existing Mesolithic population, centuries before the Christian era.However according to Tamil tradition in Sri Lanka, they believe that they are lineal descendants of the aboriginal Naga and Yaksha people of Sri Lanka. The "Nakar" used the cobra totem known as "Nakam" in the Tamil language, which is still part of the Hindu Tamil tradition in Sri Lanka today as a subordinate deity.
Pre-historic period
The indigenous Veddhas of Sri Lanka are ethinically related to tribal people of South India. Settlements of people culturally similar to those of present-day Sri Lanka and Tamil Nadu in modern India were excavated at megalithic burial sites at Pomparippu on the west coast and in Kathiraveli on the east coast of the island, villages established between the 5th century BC and 2nd century AD. Cultural similarities in burial practices in South India and Sri Lanka were dated by archeologists to 10th century BC. However, Indian history and archaeology have pushed the date back to 15th century BC, and in Sri Lanka, there is radiometric evidence from Anuradhapura that the non-Brahmi symbol-bearing black and red ware occur at least around 9th or 10th century BC.Historic period
Medieval period
In the 9th and 10th centuries AD, Pandya and Chola incursions into Sri Lanka culminated in the Chola annexation of the island, which lasted until the latter half of the 11th century CE.The decline of Chola power in Sri Lanka was followed by the restoration of the Polonnaruwa monarchy in the late 11th century AD.In 1215, following Pandya invasions, the Tamil-dominant Arya Chakaravarthi dynasty established an independent Jaffna kingdom on the Jaffna peninsula and parts of northern Sri Lanka. The Arya Chakaravarthi expansion into the south was halted by Alagakkonara, a man descended from a family of merchants from Kanchipuram in Tamil Nadu. He was the chief minister of the Sinhalese king Parakramabahu V (1344–59 AD). Vira Alakeshwara, a descendant of Alagakkonara, later became king of the Sinhalese, but he was overthrown by the Ming admiral Cheng Ho in 1409 AD. The Arya Chakaravarthi dynasty ruled over large parts of northeast Sri Lanka until the Portuguese conquest of the Jaffna Kingdom in 1619 AD. The coastal areas of the island were taken over by the Dutch and then became part of the British Empire in 1796 AD. The English sailor Robert Knox described walking into the island’s Tamil country in the publication An Historical Relation of the Island Ceylon, annotating some kingdoms within it on a map in 1681 CE. Upon arrival of European powers from the 17th century CE, the Tamils' separate nation was described in their areas of habitation in the northeast of the island.The caste structure of the majority Sinhalese has also accommodated Hindu immigrants from South India since the 13th century AD. This led to the emergence of three new Sinhalese caste groups: the Salagama, the Durava and the Karava. The Hindu migration and assimilation continued until the 18th century AD.