I thought this was a nice little piece of eye candy. It's in the new stages, but they'll be adding more images over time. The most recent adds are from the Smithsonian Folkways collection and is great for music fans. This is from their Book Art section that is just getting started.
They also have some old seed catalog art that are great for anyone interested in the Victorian style or wants to have a more garden floral look in their house. Here's a sample of their framed posters: