Bikaner is a District in the northwest of the state of Rajasthan in northern India. The city is the administrative headquarters of Bikaner District and Bikaner division. It was formerly the capital of the princely state of Bikaner. The city was founded by Rao Bika in 1486 and from its small origins it has developed into the fourth largest city in Rajasthan. Just like Jaipur, Bikaner is called the Green City. .Bikaner Fort is popularly referred to as the Junagarh Fort. It was built by Raja Rai Singh who was one of Mughal emperor Akbar's trusted generals. There are as many as 37 citadels which protects the fort. This is one fort in Rajasthan which has never been annexed or conquered. There was one dubious instance though when Prince Kamaran laid seize to the fort, but could not keep it on hold for even 24 hours..