The Keezhadi museum, constructed in Chetti nadu architectural style was inaugurated by Tamil Nadu Chief Minister MK Stalin at the excavation site, Sivagangai District.
The museum contains artefacts unearthed from the Keezhadi excavation sites since 2018.
Keezhadi had the ancient civilisation that thrived on the banks of the Vaigai.
Vaigai riverbed was urbanised during the early 6th century BCE, around the same time that the Ganges civilisation was urbanised.
Artefacts classified into categories of Keezhadi and Madurai, Agrarian and Water Management, Ceramic Industry, Weaving and Iron Industry, Sea Trade and Lifestyle.
The excavations at Keeladi pushed the Sangam Age to 6th Century BCE from the earlier assessment of between 3rd Century BCE and 3rd Century CE.
More than 1000 symbols and 60 pot shells with lettering in Thamizhi, an ancient Tamil script, have been found.
The ASI carried out explorations at 293 sites along the Vaigai Valley in Theni, Dindigul, Madurai, Sivagangai and Ramanathapuram districts in 2013-14.
The excavation was carried out at Pallichanthai Thidal of Keeladi.
The State Department of Archaeology took over from the fourth season in 2018.
From the sixth season, Konthagai, Agaram and Manalur were added as clusters of Keeladi.
While Konthagai is largely a burial site, Agaram and Manalur show the existence of an active human habitation.