It took 22 years to build: The Taj Mahal was built between 1632 and 1653 by Mughal emperor Shah Jahan in memory of his third wife Mumtaz Mahal.
Over 22,000 laborers worked on the construction: The laborers came from all over India and were skilled in a variety of trades, including masonry, carpentry, and stone carving.
The construction cost 32 million Indian rupees at that time: This is equivalent to billions of dollars in today's money.
The white marble used in the Taj Mahal was brought from all over India: The marble was brought from quarries in Rajasthan, Gujarat, and Makrana.
The Taj Mahal is made up of over 28 different types of precious stones: These stones include jade, turquoise, lapis lazuli, and amethyst.