In his book Taj Mahal: The True Story, Oak says the Taj Mahal is not Queen Mumtaz's tomb but an ancient Hindu temple palace of Lord Shiva (then known as Tejo Mahalaya ) . In the course of his research Oak discovered that the Shiva temple palace was usurped by Shah Jahan from then Maharaja of Jaipur, Jai Singh. https://taxirajasthan.in/taxi-package/jaipur-sightseeing-package