Brought to light from the depths of libraries, museums, and galleries around the world, these forgotten artistic treasures include portraits of the British explorer with a penchant for riding crocodiles, and the Italian monk who levitated so often he's recognized as the patron saint of airplane passengers. In this profusely illustrated guide, discover impossible medieval land yachts, floating churches, and eagle-powered airships, as well as dog-headed holy men, armies of German giants, 18th-century stuntmen, human chessboards, and more marvels.