In 1492, Christopher Columbus, of course, sailed the ocean blue. And on his journey home, he wrote a letter to his patrons, King Ferdinand and Queen Isabella of Spain, describing his discovery of the new world, and in effect, asking for more money to make another trip. Columbus' voyage marked one of the great plot points in history.

Upon his return, his letter was printed and distributed throughout Europe, making for blockbuster news. Columbus' original handwritten letter, penned on the high seas, no longer exists, but some of the printed copies do. Most are housed in prestigious libraries, and for centuries, that's where they've remained.