The JanakiMandir was built by Queen BrisabhanuKunwari of Tikamgarh from central India in AD 1911, at a cost of Rupees 900,000. In local parlance, the temple is also called NauLakhaMandir or Temple of Nine Lakh Rupees.
In 1657, a golden statue of the Goddess Sita was found at the very spot, and Sita is also said to have lived there. The legend had it that it was built on the holy site where SannyasiShurkishordas had found the images of Goddess Sita. In fact, Shurkishordas was the founder of modern Janakpur and the great saint and poet who preached about the SitaUpasana (also called SitaUpanishad) philosophy. Legend has it that King Janaka performed the worship of 'Shiva-Dhanus' on this very site.