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In the early 1800s, botanist and painter Pierre-Joseph Redouté painted hundreds of lily and rose species. Nicholas Rougeux restored the illustrations by hand for an accurate and browsable catalog of flowers. Rougeux documented the tedious process.
The illustrations organized by color are available as posters.
(In case you need something nice to look at after a long night.)
Tags: catalog, flowers, Nicholas Rougeux, Pierre-Joseph Redouté