‘Lingaraj’ translates to the King of Lingam, that is none other than Lord Shiva. In the beginning, Shiva was worshipped as Kirtivasa and then later he became popular as Harihara which is the form people worship him in now.
Moreover, he later gained popularity as Tribhuvaneshwara. Also called Bhubneshwar, the monarch of the three worlds namely earth, heaven and netherworld. His companion Goddess Parvati then came to be known as Bhuvneshwari.
Historians predict that the present form of Lingaraj temple was built in the last decade of the eleventh century. Evidence in some of the seventh century Sanskrit texts concludes that the construction of some parts of the temple took place in the sixth century CE.
According to Fergusson the initiation for the temple was done by Lalat Indu Keshari who ruled in 615-657 CE. The construction of Assembly Hall (Jagamohana), sanctum and temple tower dates back to 11th century. However, the construction of the offering hall (Bhoga-Mandapa) took place in the twelfth century.
The credits for the construction of Nata Mandira is given to the wife of Salini between 1099 and 1104 CE. The timing of the completion of the Lingaraj temple coincided with the growth of the Jagannath sect. Hence, historians believe that Harihara form that is the combination of Shiva and Vishnu co-exist in the temple.
Later, the rulers of the Ganga Dynasty who were followers of Vaishnavism built the Jagannath temple at Puri in the twelfth century.