I found a "street map" of ground floor of the walled city:
There are no existing copies (to the best of my knowledge) of the 'street maps' of the other levels. Note that the average number of stories of the 'fabric' that was the walled city was between 10-14. One could traverse from one side of the structure to the other without going down to ground floor. It was also allegedly possible (albeit difficult without a guide) to circumnavigate the perimeter of the 'roof' of the structure.
Conference on walled city:
