This 16th Century book is interesting because of the illustrations. In a time when people were more familiar with memory techniques, could there be some relationship with memory techniques?
Example: see the 14 circular drawings at 1:36 in the video.
Edit: sorry, the original video that was here became unavailable.
Here’s a different video of the book (and some other books of hours). The time mentioned above isn’t correct, but it’s worth taking a look at the artwork.