The history of Harishankar Temple is intertwined with local legends and folklore. While the exact origins remain debated, it is believed that the temple has existed for centuries, with renovations and expansions occurring over time. The Gandhamardan hills, where the temple is located, are mentioned in ancient Hindu scriptures, adding to the site's historical importance. The temple's architecture reflects a blend of different styles, indicating the influence of various dynasties that ruled the region. Local rulers and devotees have contributed to the temple's upkeep and development, ensuring its preservation as a significant religious and cultural landmark. The syncretic nature of the deity, combining Vishnu and Shiva, also points to a history of religious harmony and integration in the area.