The Chola-era Anaimangalam copper plates were returned to India by Leiden University in the Netherlands.
The 21 copper plates belong to the Chola period and contain inscriptions in Sanskrit and Tamil.
The plates carry the royal seal of Rajendra Chola I and provide details about the Chola and Srivijaya empires.
The inscriptions mention the donation of 26 villages for a Buddhist vihara at Nagapattinam.
The plates had been kept at Leiden University in the Netherlands since 1862 and will now be handed over to the Archaeological Survey of India for preservation and display.