This encyphered engineering book is interesting, maybe?

[Bluetoes101]

Why did we ever stop putting armored knights on top of basket lids?

I feel like my laundry basket is in need of one now.. 
Also, I think this is the only time I've seen work from this time where an entire page is blacked out and the page material used as the colour.. though I'm sure there will be more and I just haven't seen 99.9% of stuff..  

About those vertical, slender constructions, what are they even? It looks like they each have a flame on top, so maybe lamp stands like you'd find in an Italian palace?

They remind me of the Sforza hours 

   

Looking again they seem to be around cannons, and also columns. Maybe Marco can enlighten us? 
(Pages 59,60 and 91)