Ballabgarh, is a large town and a tehsil (subdistrict) in Faridabad district of Haryana, India, and is part of the National Capital Region. The town was founded by Raja Balram Singh, in 1739, who also built the Nahar Singh Mahal palace in the same year. Raja Nahar Singh (1823–1858) was the last king of the princely state, he was executed for taking part in the 1857 war of independence in 1858. The town of Ballabhgarh is only from Delhi, and today lies on the National Highway 2, a major portion of historical Grand Trunk Road. It is connected to Faridabad and south-east Delhi by the Delhi Metro. Ballabhgarh is the fourth city in Haryana to get metro connectivity after Gurgaon, Faridabad and Bahadurgarh.