This oval image of Mumtaz Mahal has been finely painted in polychrome with gold highlights.
Such images were produced in Delhi in the 19th century for the colonial market.
Mumtaz Mahal (1593-1631) was the chief consort of Mughal emperor, Shah Jahan, from 1628 until her death in 1631, after which Jahan commissioned the Taj Mahal at Agra as her tomb.
The image is under its original glass mount and attached to the backing paper to which it was originally attached. It is otherwise unframed.
References
Dalrymple, W., & Y. Sharma (eds.), Princes and Painters: in Mughal Delhi, 1707-1857, Yale University Press, 2012.