Six onion-roof towers supporting heavens

[Bluetoes101]

While looking at the pharma vessels for the last month or so, I have been educating myself on various techniques of the time in relation to various materials. 
I can say that its been dull as dish water and I wish I never started.. but along the way I have learned certain things.

   

   

This is the sort of thing you see on the bases of the 6 objects in the centre of the ROS. It is not a part of building construction.
I'm pretty confident they are vessels of some sort. And, it would be odd that a scribe just thought this was ok to do based on just things they could draw. 

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