Mahakaleshwar Jyotirlinga is a Hindu temple dedicated to Shiva and is one of the twelve Jyotirlingas, shrines which are said to be the most sacred abodes of Shiva. It is located in the ancient city of Ujjain in the state of Madhya Pradesh, India. The temple is situated on the side of the holy river Shipra. The presiding deity, Shiva in the lingam form is believed to be Swayambhu, deriving currents of power (Shakti) from within itself as against the other images and lingams that are ritually established and invested with mantra-shakti.