It is situated at the banks of Ganges and was former capital of Bengal Subah under Mughal governor, Man Singh I. Rajmahal has an area of 7.5 square kilometres (2.9 sq mi).

Later, after the conquest of Odisha in 1592, Raja Man Singh I, Mughal governor of Bengal Subah came to Rajmahal.

Raja Man Singh I, also renamed the town in 1595 as 'Akbarnagar' in tribute to Emperor Akbar and he also constructed palace, garden and mosque on behalf of Mughal rulers.

During his halt at Rajmahal, Siraj-ud-Daulah was captured by Mir Jafar's son Miran and was murdered at the site.

Nawab Mir Qasim was defeated by the British and fled with his family to the Rohtas (Bihar), but was not able to hide at the Rohtasgarh Fort.

[6] Later, Daman-i-Koh became the origin of Santhal Rebellion and leaders like Sidhu and Kanhu Murmu, Chand and Bhairab, etc.

Among the civic amenities, it had 10 km roads with both open and closed drains, the protected water supply involved hand pump, uncovered well.

Among the social, cultural and recreational facilities, it had 2 cinema theatres, 2 auditorium/ community halls, 2 public libraries, 2 reading rooms.