It is an watertight fortress, which has never been conquered. Built in 1593 A.D. by Raja Rai Singh, one of the most famous generals in the army of Emperor Akbar, the fort is a formidable structure encircled by a moat.The main entrance to the fort is Karan Pol [gate], that is east facing. Next to it is the Suraj Pol meaning the sun gate. The fort situates in it some very outstanding palaces like Anup Mahal, Ganga Niwas and Rang Mahal or palace of pleasure. The Har Mandir is the majestic chapel for the royal family for worshipping their gods and goddesses.