The Walled City of Lahore is one of the most important historic cities in the sub-continent. Although much altered by recent development, it still retains considerable original character. Within the confines of the city are a number of important monuments, many of which are in urgent need of conservation. In 2007 Aga Khan Cultural Service Pakistan (AKCSP) started a programme1 as a strategic partner with Government of the Punjab to link many of monuments in the Walled City of Lahore along a historic route, the Shahi Guzargah, or so-called Royal Route, starting from the Dehli Gate and culminating at the Lahore Fort. One of the most significant monuments along this route is the Wazir Khan Mosque.
As a major conservation initiative in the whole programme and in the absence of any previous base documentation, it was important for AKCSP to start and demonstrate the best standard practices in documentation of architectural heritage in Pakistan. Therefore, the 380 years old Wazir Khan Mosque was carefully documented using REDM and rectified photography techniques and this paper will present the outcomes and issues of documenting an outstanding example of Mughal monument for the first time in the Walled City of Lahore.