Origins and architecture of the Taj Mahal AD (1053 AH) the official sources documenting the twelfth Urs give a detailed description of a substantially completed complex. Decorative work apparently continued until 1648 AD (1058 AH) when Amanat Khan dated the north arch of the great gate with the inscription "Finished with His help, the Most High". The Taj Mahal was constructed using materials from all over India and Asia. The buildings are constructed with walls of brick and rubble inner cores faced with either marble or sandstone locked together with iron dowels and clamps. Some of the walls of the mausoleum are several metres thick. Over 1,000
The Taj Mahal Palace Hotel were staying in the Taj Mahal Palace and Hotel at the time of the seizure. The attack was planned using information compiled by David Headley, a Pakistani-American, who had stayed at the hotel multiple times. Soon after (30 November), Tata chairman Ratan Tata said in an interview with CNN's Fareed Zakaria that they had received advance warning of the attacks and that some countermeasures had been taken. These may have been relaxed before the attack, but in any case were easily sidestepped by the operatives. The less-damaged sections of the Taj Mahal Palace and Tower hotel reopened on 21 December