The proverb says “Rivers need a spring.” As a designer, to get a vision for where I’m headed, it sometimes helps to be reminded of where the craft originated.
To that end, I point you to an educational website called the Rare Book Room, where you will find high resolution digital images of over 400 of the world’s rarest books and manuscripts. (It was originally Octavo, a company founded by John Warnock, one of the founders of Adobe Systems that sold the book images on CD-ROMs.)
Today, versions of the imagery are free. The collection includes materials on everything from Art and Architecture to Reference and Religion by everyone from Aesop and Aristotle to Willughby and Wyclif.
A few examples…
At the top of the screen: