Bhubaneswar is called the Ekamra Kshetra as the deity of Lingaraja was originally under a mango tree (Ekamra). Ekamra Purana, a Sanskrit treatise of the 13th century mentions that the presiding deity was not seen as lingam (an aniconic form of Shiva) during the Satya and Treta yugas and only during the Dwapara and Kali yugas, it emerged as a lingam. The lingam in the temple is a natural unshaped stone that rests on a Sakti. Such a lingam is called Krutibasa or Swayambhu and is found in 64 places in different parts of India. With the advent of the Ganga dynasty in the early 12th century, who had Vaishnavaite orientation, a new movement started resulting in the synthesis of Saivism and Vaishnavism. The Ekamra was associated with Vaishanavite gods Krishna and Balaram during the period.