Origins and architecture of the Taj Mahal order to all the elements of the Taj Mahal. Hierarchical ordering of architecture is commonly used to emphasise particular elements of a design and to create drama. In the Taj Mahal, the hierarchical use of red sandstone and white marble contributes manifold "symbolic" significance. The Mughals were elaborating on a concept which traced its roots to earlier Hindu practices, set out in the Vishnudharmottara Purana, which recommended white stone for buildings for the Brahmins (priestly caste) and red stone for members of the Kshatriyas (warrior caste). By building structures that employed such colour-coding, the Mughals identified themselves with the two
Taj Mahal in the event of an earthquake. In 2011, it was reported that some predictions indicated that the tomb could collapse within 5 years. Small minarets located at two of the outlying buildings were reported as damaged by a storm on April 11, 2018. The Taj Mahal attracts a large number of tourists. UNESCO documented more than 2 million visitors in 2001, which had increased to about 7–8 million in 2014. A two-tier pricing system is in place, with a significantly lower entrance fee for Indian citizens and a more expensive one for foreigners. In 2018, the fee for Indian citizens