Digging through the archives of old libraries is a blast. Depending on the library, you'll find everything from dated architectural drawings to snippets of old children's books. You can just imagine the treasures to be found in the British Library's ancient archive. And, now, you don't even have to get your fingers dusty!

The British Library just uploaded over a million images from the 17th to the 19th centuries to Flickr Commons.

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