Final answer:
The Taj Mahal, located in Agra, India, was built by Shah Jahan in memory of his wife Mumtaz Mahal and is a masterpiece of Mughal architecture.
Step-by-step explanation:
The monument built at the order of Shah Jahan in the memory of his wife Mumtaz Mahal is the Taj Mahal. Constructed in Agra, India, from 1632 to 1653, the Taj Mahal stands as a testament to love and is Shah Jahan's most famous architectural achievement. This exemplar of Mughal architecture is renowned for its symmetry, its reflective pool, and its location along the south bank of the Yamuna river. The white marble structure is adorned with semi-precious stones and features verses from the Quran. Intended as a tomb for Mumtaz Mahal, it also houses the remains of Shah Jahan himself. Reflecting its importance, the Taj Mahal incorporates elements from various architectural styles, including Indian, Islamic, Persian, and Ottoman, making it a masterpiece of design and craftsmanship.