Ajmer is the 31st largest hindi speaking city of India with a total population of 5,40,000. Highest employment in the Ajmer district is in Agriculture, and in the Construction and the Engineering industries. The district has 62% agriculture workers, 35% Industry and services workers and 3% Household workers. The region is a good Agricultural belt because of the availability of ground water. Located on the slopes of the Taragarh hill in the Aravalli mountain ranges, Ajmer was originally known as Ajayameru and was founded by Raja Ajaipal Chauhan in the 7 century A.D. It remained a strong hold of the Chauhans till 1193 A.D., till Prithvi Raj Chauhan, the last Hindu ruler lost the region to Mohammed Ghori. Ajmer became part of the Delhi Sultanate, but thereafter, Rana Kumbha and Raja Maldeo of Marwar established Rajput rule over Ajmer. The region remained as the battle ground for power between the Rajputs, Mughals and the Marathas, till the British annexed it in 1818 A.D following the treaty signed with the Maratha chief. During the British rule, this small but strategic area of Ajmer was retained and administrated by the Central Government directly. The Ajmer Sharif Dargah remains as one of the most visited religious sites in India.