Bihar is the land of rich cultural heritage that is why you will find large number of heritage monuments all across the Bihar. Among these monuments Rohtasgarh Fort is most important one. It is situated at distance of 55km from Sasaram at the height of 2000 feet above the sea level on Kaimur mountain. The history of Rohtasgarh Fort is not clear According to some local legends Rohtasgarh Fort was built by  Rohitsava the son of legendary king Harishchandra. For long time this fort was remaind under control of Hindu king but it was passed to Ser Shah Suri in 1539. In 1558 Raja Man Singh  Akbar's General ruled Rohtas. As the Governor of Bengal and Bihar. he made Rohtasgarh his headquarters in view of it's inaccessibility and other natural defences. He renovated the whole fort. During 1857 Independence war Kunwar Singh and his brother Amar Singh took shelter here.
This is one of the largest fort in the world. It is spread in 42km. It has 83 gates among these gates Ghoraghat,Rajghat,Medhaghat,Kathotiyaghat,Hathiya Pol(Elephant gates) are main. It has also network of many underground palaces and tunnels.where during Ser Shah Suri regime 10000 soldiers used to lived here. Ser Shah Suri was built boundary wall around it for the protection of this fort. In the whole compus you will find many temples, Masques, Palaces. Main temples are Rohtasan temple, Devi temple,Ganesh temple. About a mile to the North-East of the palace there are the ruins of two temples one is Rohtasan a temple of lord Shiva. Iconoclasts probably destroyed the roof and the main mandap which housed the sacred lingam. Now only 84 steps are left which lead to a temple. The domes crest the devi Mandir the idol of the deity is missing from here also. Ganesha temple the sanctum of the temple faces two porch-ways. This is similar to ossian temple of Jodhpur and the Mira Bai temple of Chittor.
Jama masjid and Habsh Khan's  Mausoleum outside the palace grounds are the buildings of Jama masjid, Habsh Khan's Mausoleum  and the Makbara of Shufi Sultan. The beautiful stucco style with the cupola resting on pillar reminds of the Rajputana style where the domed structures are known as chhatris.
Among the Palaces Rangmahal,Shishmahal,Panchmahal,Khuta-mahal, Aina Mahal,Rani Ka Jharokha, Court of Man Singh, Takhte Badshahi,Diwan-e- khas. The Aina Mahal is the palace of the chief wife of Man Singh is in the middle of the palace. Takhte Badshahi is a four-storied building with a cupola on top where Man Singh himself resided. There is an assembly hall in the second floor and a gallery resting on strong, engraved stone pillars. The third floor has a tiny cupola, which opens into the women's quaters from the fourth floor one can get a bird's eye view of the surrounding area. The residential quaters of Man Singh were on the first floor, which was connected to the ladies room via a gateway in the east. Diwan-e-khas  is a hall is decorated with etchings of flowers and leaves and lie on similarly decorated pillars. Today thick vegetation has taken over the all around the it. That is why it has became inaccessible. It appears that no one has visited here since centuries. The structures of  fort is collapsing itself because lack of maintenance. Many people scratch their names on walls and make it sullying remants of its architecture grandeur. Governments, Archeological Survey of India and local people are watching just like a mute Spector and this fort is saying save me and return my Golden days.