Funny story though, speaking of renaissance art- I was doing research for my Master's thesis on computer graphics, and got direct access to several books from the 1700s that outlined the geometry of perspective projection as well as the geometry of shadows. (My thesis was about rendering shadows.) They were hand-written tomes, with very ornate covers and bindings and hand-drawn diagrams. The books weren't allowed to leave, but they had a special reading room for them, with archive-safe lead weights to hold the pages down so I wouldn't spread my damaging finger oils everywhere. I was taking some digital photos, and at one point I forgot about the lead weights and turned the page. It tore a little bit, and I was completely mortified!
Sorry, history!