Taj Mahal was built by a Muslim, Emperor Shah Jahan (died 1666 C.E.) in the memory of his dear wife and queen Mumtaz Mahal at Agra, India. It is an "elegy in marble" or some say an expression of a "dream." Taj Mahal (meaning Crown Palace) is a Mausoleum that houses the grave of queen Mumtaz Mahal at the lower chamber. The grave of Shah Jahan was added to it later. The queen real name was Arjumand Banu. The name Taj Mahal may come from the Persian for "The greatest palace," or it may be a variant of Mumtaz Mahal's name. Literally, her name meant "the greatest, " or "the chosen one." The Taj Mahal is considered to be the greatest architectural achievement in the Indo-Islamic architecture.

The interior chamber of the Taj Mahal steps far beyond traditional decorative elements. Here, the inlay work is not pietra dura, but a lapidary of precious and semiprecious gemstones. The inner chamber is an octagon with the design allowing for entry from each face, although only the door facing the garden to the south is used.
The interior walls are about 25 metres (82 ft) high and are topped by a "false" interior dome decorated with a sun motif. Eight pishtaq arches define the space at ground level and, as with the exterior, each lower pishtaq is crowned by a second pishtaq about midway up the wall. The four central upper arches form balconies or viewing areas, and each balcony's exterior window has an intricate screen.