The Taj Mahal was commissioned by Mughal emperor Shah Jahan to be built in the memory of his wife Mumtaz Mahal. It took over 20 years to complete, employing thousands of artisans under the supervision of Ustad Isa. The architectural beauty of the Taj Mahal comes from its blending of elements from Persian, Turkish and Indian styles, with white marble and precious stones. It is recognized as the finest example of Mughal architecture and was designated a UNESCO World Heritage Site in 1983.