Baegun hwasang chorok buljo jikji simche yojeol (vol.II), the second volume of "Anthology of Great Buddhist Priests' Zen Teachings"

Also known as Jikji (other names are Jikji simche yojeol, Jikji simche, Jikji simgyeong), this volume contains the essentials of Zen Buddhism compiled by the Baegun in the late Goryeo period and was printed the old Heungdeok-sa temple in Cheongju city, using movable metal types in July 1377. While some earlier metal type printings were mentioned in the old Korean books, this book is the world's oldest movable metal type printing evidence available and signifies an important technical change in the print history of humanity. Read more about this element on the UNESCO Memory of the World website.