The Taj Mahalis considered the finest example of Mughal architecture, a style that combines elements from Islamic, Indian and Persian architectural styles. In 1983, the Taj Mahal became a UNESCO World Heritage Site.

While the white domed marble mausoleum is its most familiar component, the Taj Mahal is actually an integrated complex of structures. Building began around 1632 and was completed around 1653, and employed thousands of artisans and craftsmen. The construction of the Taj Mahal was entrusted to a board of architects under imperial supervision including Abd ul-Karim Ma'mur Khan, Makramat Khan, and Ustad Ahmad Lahauri. Lahauri is generally considered to be the principal designer.

In 1631, Shah Jahan, emperor during the Mughal empire's period of greatest prosperity, was griefstricken when his third wife, Mumtaz Mahal, died during the birth of their fourteenth child, Gauhara Begum. Construction of the Taj Mahal began in 1632, one year after her death.

The central focus of the complex is the tomb. This large, white marble structure stands on a square plinth and consists of a symmetrical building with an iwan (an arch-shaped doorway) topped by a large dome and finial. Like most Mughal tombs, the basic elements are Persian in origin.The Taj Mahal seen from the banks of river Yamuna

The base structure is essentially a large, multi-chambered cube with chamfered corners, forming an unequal octagon that is approximately 55 metres (180 ft) on each of the four long sides. On each of these sides, a massive pishtaq, or vaulted archway, frames the iwan with two similarly shaped, arched balconies stacked on either side. This motif of stacked pishtaqs is replicated on the chamfered corner areas, making the design completely symmetrical on all sides of the building. Four minarets frame the tomb, one at each corner of the plinth facing the chamfered corners. The main chamber houses the false sarcophagi of Mumtaz Mahal and Shah Jahan; the actual graves are at a lower level.

Exterior decoration :The exterior decorations of the Taj Mahal are among the finest to be found in Mughal architecture.[citation needed] As the surface area changes the decorations are refined proportionally. The decorative elements were created by applying paint, stucco, stone inlays, or carvings. In line with the Islamic prohibition against the use of anthropomorphic forms, the decorative elements can be grouped into either calligraphy, abstract forms or vegetative motifs.

Interior decoration :The interior chamber of the Taj Mahal steps far beyond traditional decorative elements. Here, the inlay work is not pietra dura but lapidary of precious and semiprecious gemstones. The inner chamber is an octagon with the design allowing for entry from each face, although only the south garden-facing door is used. The interior walls are about 25 metres (82 ft) high and topped by a "false" interior dome decorated with a sun motif.