 The tomb is the centrepiece of a complex, which includes a mosque and a guest house, and is set in formal gardens bounded on three sides by a crenellated wall.Construction of the mausoleum was essentially completed in 1643, but work continued on other phases of the project for another 10 years.The Taj Mahal complex is believed to have been completed in its entirety in 1653 at a cost estimated at the time to be around 32 million rupees, which in 2020 would be approximately 70 billion rupees (about U.S. $916 million).