Explanation:

Navratangarh 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. Nagvanshi king Bairisal shifted his capital from Khukhragarh to Navratangarh. The fort was constructed by King Durjan Sal. 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.