French researchers have unearthed a 800 page masterpiece written in 1692. It’s a fully illustrated guide to color theory. Only one copy was ever created, and even when originally written, very few people would have seen it.

French researchers have unearthed a 800 page masterpiece written in 1692. It’s a fully illustrated guide to color theory. Only one copy was ever created, and even when originally written, very few people would have seen it.