On that 539 prayer carpets have been neatly marked out with black marble. All over there is exquisite calligraphy and the name Allah and quotations from scriptures inscribed. The ceiling is painted in a repeating design. The roof supports four octagonal towers and three elegant domes. On either side of the Mosque, to the north and south, and set along and upon the enclosure wall, there are two towers.
On the east side of the Taj stands a twin of the Mosque; a parallel structure also made of red sandstone, referred to as the Jawab, or "answer". Because it faced away from the Mecca, it was never used for prayer. No one is quite sure what it was used for. Some speculate it was a resting place for visitors or a meeting hall before prayers. Some even say its purpose was purely architectural, to counterbalance the Mosque and preserve the symmetry of the entire design on the Taj complex. The Jawab is similar to the Mosque, but instead of Quranic inscriptions contains flower designs and other decorations in white marble on the red sandstone background.
The origin of the name "Taj Mahal" is not clear. Court histories from Shah Jehan's reign only call it the Rauza (tomb) of Mumtaz Mahal. It is generally believed that "Taj Mahal" (usually translated as either "Crown Palace" or "Crown of the Palace") is an abbreviated version of her nickname, Mumtaz Mahal.
What is certain however is that the theTaj Mahal's immense beauty will remain an immortal memory to all as it was intended. Shah Jehan's promise fulfilled, the world will never forget Arjumand Banu Begum or her last palatial resting place.