Navratangarh (Doisagarh) was one of the capitals of the Nagvanshi dynasty, who ruled parts of what is now the state of Jharkhand, India. It is located in Sisai block of Gumla district. It is said that king Durjan Shah shifted his capital from Khukhragarh to Navratangarh. He constructed the fort between 1636 and 1639. The palace was a five-storeyed structure with its "water-gate" and garh-khai (moat) arrangement. It has a kiaclmy (court), a treasury house and a prison-cell with its underground dungeon. It was declared national heritage in 2009.