Stone tools and Microliths have discovered from Chota Nagpur Plateau region which are from Mesolithic and Neolithic period. There are ancient Cave Paintings in Isko, Hazaribagh district which are from Meso-chalcolithic period (9,000-5,000 BC). There is a group of megaliths found close to Barkagaon that is about 25 km from Hazaribagh at Punkri Barwadih, which has been proven to date back to beyond 3000 BCE.