The Taj Mahal ( more often /ˈtɑːʒ/ from Persian and Arabic, "crown of palaces", pronounced [ˈt̪aːdʒ mɛˈɦɛl]) is a white marble mausoleum located on the southern bank of Yamuna River in the Indian city of Agra. It was commissioned in 1632 by the Mughal emperor Shah Jahan (reigned 1628–1658) to house the tomb of his favorite wife of three, Mumtaz Mahal.

Construction of the mausoleum was essentially completed in 1643 but work continued on other phases of the project for an additional ten years. The Taj Mahal complex is believed to have been completed in its entirety in 1653 at a cost estimated at the time to be around 32 million Indian rupees, which in 2015 would be valued at around 52.8 billion Indian rupees ($827 million US). The construction project employed around 20,000 artisans under the guidance of a board of architects led by Ustad Ahmad Lahauri. The domed marble tomb is part of an integrated complex consisting of gardens and two red-sandstone buildings surrounded by a crenellated wall on three sides.

The Taj Mahal is regarded by many as the best example of Mughal architecture and is widely recognized as "the jewel of Muslim art in India". It is one of the world’s most celebrated structures and a symbol of India’s rich history. Designated a UNESCO World Heritage Site in 1983, the Taj Mahal attracts some 3 million visitors a year.

n 1631, Shah Jahan, emperor during the Mughal empire's period of greatest prosperity, was grief-stricken when his favorite of three wives and beloved companion, Mumtaz Mahal, a Persian princess, died during the birth of their 14th child, Gauhara Begum Construction of the Taj Mahal began in 1632. The court chronicles of Shah Jahan's grief illustrate the love story traditionally held as an inspiration for Taj MahalThe principal mausoleum was completed in 1643^[ and the surrounding buildings and garden were finished about five years later.

The Taj Mahal incorporates and expands on design traditions of Persian and earlier Mughal architecture. Specific inspiration came from successful Timurid and Mughal buildings including; the Gur-e Amir (the tomb of Timur, progenitor of the Mughal dynasty, in Samarkand),^[7] Humayun's Tomb, Itmad-Ud-Daulah's Tomb (sometimes called the Baby Taj), and Shah Jahan's own Jama Masjid in Delhi. While earlier Mughal buildings were primarily constructed of red sandstone, Shah Jahan promoted the use of white marble inlaid with semi-precious stones. Buildings under his patronage reached new levels of refinement

The tomb is the central focus of the entire complex of the Taj Mahal. It is a large, white marble structure standing 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 base structure is a large multi-chambered cube with chamfered corners forming an unequal eight-sided structure that is approximately 55 metres (180 ft) on each of the four long sides. Each side of the iwan is framed with a huge pishtaq or vaulted archway 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.

The most spectacular feature is the marble dome that surmounts the tomb. The dome is nearly 35 metres (115 ft) high which is close in measurement to the length of the base, and accentuated by the cylindrical "drum" it sits on which is approximately 7 metres (23 ft) high. Because of its shape, the dome is often called an onion dome or amrud (guava dome).^[11] The top is decorated with a lotus design which also serves to accentuate its height. The shape of the dome is emphasized by four smaller domed chattris (kiosks) placed at its corners, which replicate the onion shape of the main dome. Their columned bases open through the roof of the tomb and provide light to the interior. Tall decorative spires (guldastas) extend from edges of base walls, and provide visual emphasis to the height of the dome. The lotus motif is repeated on both the chattris and guldastas. The dome and chattris are topped by a gilded finial which mixes traditional Persian and Hindustani decorative elements.

The main finial was originally made of gold but was replaced by a copy made of gilded bronze in the early 19th century. This feature provides a clear example of integration of traditional Persian and Hindu decorative elements. The finial is topped by a moon, a typical Islamic motif whose horns point heavenward.

The minarets, which are each more than 40 metres (130 ft) tall, display the designer's penchant for symmetry. They were designed as working minarets—a traditional element of mosques, used by the muezzin to call the Islamic faithful to prayer. Each minaret is effectively divided into three equal parts by two working balconies that ring the tower. At the top of the tower is a final balcony surmounted by a chattri that mirrors the design of those on the tomb. The chattris all share the same decorative elements of a lotus design topped by a gilded finial. The minarets were constructed slightly outside of the plinth so that in the event of collapse, a typical occurrence with many tall constructions of the period, the material from the towers would tend to fall away from the tomb.

The exterior decorations of the Taj Mahal are among the finest in Mughal architecture. 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. Throughout the complex are passages from the Qur'an that comprise some of the decorative elements. Recent scholarship suggests that the passages were chosen by Amanat Khan.^[13][14]

The calligraphy on the Great Gate reads "O Soul, thou art at rest. Return to the Lord at peace with Him, and He at peace with you."^[14] The calligraphy was created in 1609 by a calligrapher named Abdul Haq. Shah Jahan conferred the title of "Amanat Khan" upon him as a reward for his "dazzling virtuosity".^[15] Near the lines from the Qur'an at the base of the interior dome is the inscription, "Written by the insignificant being, Amanat Khan Shirazi."^[16] Much of the calligraphy is composed of florid thuluth script made of jasper or black marble^[15] inlaid in white marble panels. Higher panels are written in slightly larger script to reduce the skewing effect when viewed from below. The calligraphy found on the marble cenotaphs in the tomb is particularly detailed and delicate.

Abstract forms are used throughout, especially in the plinth, minarets, gateway, mosque, jawab and, to a lesser extent, on the surfaces of the tomb. The domes and vaults of the sandstone buildings are worked with tracery of incised painting to create elaborate geometric forms. Herringbone inlays define the space between many of the adjoining elements. White inlays are used in sandstone buildings, and dark or black inlays on the white marbles. Mortared areas of the marble buildings have been stained or painted in a contrasting color which creates a complex array of geometric patterns. Floors and walkways use contrasting tiles or blocks in tessellation patterns.