More links for you!
There's a database of medieval and early modern machine drawings available online, for free; the earliest drawings are by Villard de Honnecourt, from the thirteenth century.
If that is not madness enough for you, why not try this blog? It gives you a new chapter of Amadis of Gaul (1508) every Tuesday, translated into English. (This book drove Don Quixote mad, or so the blog says.)
Also: chess pieces, found in Northampton.