Under the reign of Shah Jahan, the symbolic content of Mughal architecture reached a peak. The Taj Mahal complex was conceived as a replica on earth of the house of the departed in paradise (inspired by a verse by the imperial goldsmith and poet Bibadal Khan. This theme, common in most Mughal funerary architecture, permeates the entire complex and informs the detailed design of all the elements. A number of secondary principles also inform the design, of which hierarchy is the most dominant. A deliberate interplay is established between the building's elements, its surface decoration, materials, geometric planning and its acoustics. This interplay extends from what can be experienced directly with the senses, into religious, intellectual, mathematical and poetic ideas. The constantly changing sunlight reflected from the Taj's translucent marble is not a happy accident, it had a deliberate metaphoric role associated with the presence of God as light.

The popular view of the Taj Mahal as one of the world's monuments to a great "love story" is borne out by the contemporary accounts and most scholars accept this has a strong basis in fact. The building was also used to assert Jahani propaganda concerning the 'perfection' of the Mughal leadership. The extent to which the Taj uses propaganda is the subject of some debate amongst contemporary scholars. This period of Mughal architecture best exemplifies the maturity of a style that had synthesised Islamic architecture with its indigenous counterparts. By the time the Mughals built the Taj, though proud of their Persian and Timurid roots, they had come to see themselves as Indian. Copplestone writes "Although it is certainly a native Indian production, its architectural success rests on its fundamentally Persian sense of intelligible and undisturbed proportions, applied to clean uncomplicated surfaces."