I am neither an artist nor an architect, so please forgive the flaws in this depiction.
This is a very rough semi-scale model of the Holy Jerusalem and the wall
I do no believe this city to be in the shape of a cube as most teach.
There is another shape that is "4-square," and that is a pyramid.
There are also scriptures that suggest a pyramid as the shape of this city.
If any artists or architects visit this page and would like to do a better one, please
do so, and send it me in jpeg form