Science and technology in Korea

Jikji () is the abbreviated title of a Korean Buddhist document whose title translates as "Anthology of Great Buddhist Priests' Zen Teachings". Printed during the Goryeo Dynasty in 1377, it is the world's oldest extant book printed with movable metal type. UNESCO confirmed Jikji as the world's oldest book printed with movable metal type in September 2001 and inscribed it on the Memory of the World Register.

Cheomseongdae () is an astronomical observatory in Gyeongju, South Korea. Cheomseongdae is the oldest surviving astronomical observatory in Asia, and possibly even the world. It was constructed during the Silla period, during the reign of Queen Seondeok (r. 632–647 AD). Cheomseongdae was designated as the country's 31st national treasure on December 20, 1962. It is part of Gyeongju Historic Areas, a UNESCO World Heritage Site.

aspect of history

Observatory in Kaesong, North Korea