Ujjain Hindustani pronunciation: old name Avantika) or Ujjayinī is a city in Ujjain district of the Indian state of Madhya Pradesh. It is the fifth-largest city in Madhya Pradesh by population and is the administrative centre of Ujjain district and Ujjain division. It is one of the Hindu pilgrimage centres of Sapta Puri famous for the Kumbh Mela held there every 12 years. The famous temple of Mahakaleshwar Jyotirlinga is located in the center of the city. The city has been one of the most prominent trade and political centres of the Indian Subcontinent from the time of the ancient Mahājanapadas until the British colonisation of India.An ancient city situated on the eastern bank of the Shipra River, Ujjain was the most prominent city on the Malwa plateau of central India for much of its history. It emerged as the political centre of central India around 600 BCE.