Gujarat is a state in Western India and Northwest India a coastline of 1,600 km (990 mi) – most of which lies on the Kathiawar peninsula – and a population in excess of 60 million. The state encompasses some sites of the ancient Indus Valley Civilisation, such as Lothal, Dholavira, and Gola Dhoro. Gujarat's coastal cities, chiefly Bharuch and Khambhat, served as ports and trading centers in the Maurya and Gupta empires, and during the succession of royal Saka dynasties from the Western Satraps era. Gujarat was one of the main central areas of the Indus Valley Civilisation. Gujarat has a variety of museums on different genres that are run by the state's Department of Museums located at the principal state museum, Baroda Museum & Picture Gallery in Vadodara. The Kirti Mandir, Porbandar, Sabarmati Ashram, and Kaba Gandhi No Delo are museums related to Mahatma Gandhi, the former being the place of his birth and the latter two where he lived in his lifetime.