Read the given passage and answer the questions that follow.
[Same Passage as Above]

Where was the first printed book published?

The text mentions: "The Anthology of Great Buddhist Priests' Zen Teachings (1377), also known as Jikji, was printed in Korea 78 years before the Gutenberg Bible and is recognized as the world's oldest extant movable metal type book." This makes Korea the location where the world's oldest extant printed book was published.