Philipe, dos Rabiscos, acabou de me mandar isso por e-mail. Segundo a fonte originária:
This is the oldest existing document in the world printed with metal movable type: an anthology of Zen teachings, Goryeo Dynasty, Korea... 1377. It's a little known fact, at least in the West, that movable type was first developed in Korea circa 1230, over 200 years before that goldsmith from Mainz came on the scene. I saw this today in the National Library of Korea in Seoul (more on that soon). This book is actually a reproduction. The original resides in Paris and is the subject of a bitter dispute between the French and Korean governments.