Finished picture:
This is a mosque in Fatih district in Istanbul, in the area that is named after the Column of Constantine, called “Çemberlitaş” and built by Sinan.This is part of the traditional and authentic Constantinople Proper and is enclosed by the wall, and close to one of the main sites where the wall was breached by the Turks in the conquest in 1453.
This is one of the background images we shall use in our film “Following Lear” It is also an image we are using in a series of cards we are preparing for the Istanbul council.
(22nd April: the ottoman troops drag their ships across the land to attack the bay and made the wall of the Golden Horn vulnerable to attack. This was followed 7 days later by building a bridge between Ayvansaray and Sutluce. On the same day, the emperor rejected an offer of peace. It was a month later before Ulubatli Hasan erected the Ottoman flag on the Byzantine wall in Belgradkapi and towards noon on 29th May, the city fell and the Emperor was killed. The first act of Fatih Sultan Mehmed II was to turn Hagia Sophia into a Mosque.)
The pictures above show the progress in drawing. The pictures below show the interior and architectural plans
animate-tim.com 
Wonderful imagery! Visiting that mosque was quite a special memory for me.