The Taj Mahal, designed as a tomb for the wife of a 17th-century Mughal emperor, was constructed by about 20,000 workers from 1631 to 1648 in Agra, a city in northern India. The massive domed structure was constructed in the Indo-Islamic style, using white marble and inlaid gems. At each corner is a minaret (prayer tower), and passages from the Koran, the Muslim holy book, adorn the outside walls. The bodies of the emperor and his wife remain in a vault below the building.
