Greek painters were brought from the island of Chios to help with the decoration. There was a Mohammedan artist, too, a dreamy man by the name of Nakkash Ahmed Chelebi. Such was his regard for the mosque that he would come at different times of the day just to see, to admire. While out in the open sea, islands were captured, fleets were sunk, Muslims killed Christians and Christians killed Muslims, in Sinan’s cocoon-like universe they worked side by side.