9 Rosette - Specific Details

[Mark Knowles]

There are many specifics. Even the kind of architecture is very specific (saddleback tower, for example, which was the signal that it's a portal to a city in medieval times in certain areas, there's a thread on this).

But I have also seen medieval and Renaissance cosmological drawings with very realistic architecture that wasn't intended to be literal.

If I understand the towers that you are referring to I have independently concluded that they are medieval city gates.