On: The Minimalist Beauty of a Renaissance-Era Geometr...

[rotten]

This is before printing presses could produce images or diagrams - so they all had to be hand drawn in each copy.

[xtiansimon → rotten]

_"...hand drawn in each copy."_

?? Printed engraving[1] was available contemporay with the publishing of this book (1568). What do you mean?

[1]: https://en.wikipedia.org/wiki/Engraving