Excavations by the researchers of the Orissan Institute of Maritime and South East Asian Studies (OIMSEAS) have yielded "amazing" discoveries in the fields of ancient history and Buddhist heritage.Archaeologists have stumbled upon four of the 10 stupas where Lord Buddha had preached and spotted the "actual capital" of the ancient Kalinga state at Radhanagar, all in Jajpur district of Orissa.In the midst of the Monsoon Session of the Orissa Legislative Assembly on Wednesday, state culture minister Damador Rout suddenly called a press conference in another chamber and shared the unearthed historical findings with the media.