domes of the courtyard walls. Location The mosque stands on the second hill of Istanbul. Since the mosque is elevated above the surrounding area, the entrance is up the stairs and to the gate. The location of the complex is one surrounded by many shops, businesses, and the Grand Bazaar. Being such a prosperous and commercially active area, the Sultan knew it would be a convenient location for Muslims to attend prayer. It would also serve as a reminder to the people of the presence of the state and the Sultan during a time of political and economic misfortune. Ahmed Resmî Efendi tells a story of the Sultan being greeted by a spiritual old man, prior to the building of the complex, who cried, prayed for his health, and praised him for deciding to build a mosque on that specific piece of ground. It was after this incident that the Sultan purportedly decided to begin construction. The complex is also located just across the street from the Gate 1 entrance to the Grand Bazaar. The Column of Constantine, the historic Gazi Atik Ali Pasha Mosque, and the modern day Çemberlitaş rail station are all located directly south of the mosque within 400 meters. Restoration (2010–2012) The complex has been re-decorated several times over the course of its life, but a combination of environmental factors, lack of maintenance, air pollution, and original building flaws substantially degraded the state of the complex. As a result, from 2010-2012 a 20 million lira (US$3.5 million) renovation campaign was conducted by FOM group architects. The most severe issue of the complex was one of water. The leaking domes were resealed with a close-to-original lead coating and applied in traditional fashion, the drainage systems were cleared of rubble and revamped, and the basements were renovated. The walls of the mosque had been heavily blackened, required sand blasting and pressure washing. Other components of the mosque such as marble, timber, iron, and glass were cut and replaced if severely deteriorated. During the restoration campaign, several discoveries were made that further the status of the mosque as an architectural achievement and historic site: In the process of scraping old deteriorated laminar ornaments, even older hand drawn ornaments were found, preserved, and set on display. The discovery of an active cistern underneath the mosque, which by word of Foundations Istanbul Provincial Director İbrahim Özekinci required the removal of "420