Reconstruction of historical cities of Samarra at the Tigris (Capital of the Islamic Caliphate) and Babylon of Nebuchadnezzar II. at the Euphrates based on scientific excavations plans from over 100 years ago.
There aren't a lot of option for artistic interpretation, because the reconstruction of both cities has to be scientific approved. It was a juggling between visual appealing and strict scientific correct, or in other words "we know nothing but every fictional thing is the devil in persona".
Samarra was the old capital city at the beginning of the Islamic caliphate. It was a metropolis with a diameter of 32 km along the river and was nearly completely created from the thousand years old building material of first choice: clay. Jot many traces has survived the time to today.
I assume that Babylon is famous enough and i don't need to give an extra explanation about it. The work was extended about the whole city like for Samarra, but because of insufficient source - time will destroy a lot of thousand of years - I concentrated my work time on the famous blue Ishtar Gate and the procession street in front of it.