Kaesŏng (개성, 開城) is a city in North Korea, near the DMZ and the South Korean border.
Kaesong is a small city and former capital of Koryo Dynasty (918 A.D. - 1392 A.D.). It is the only major city that changed hands between North and South Korea as a result of the Korean War. It is becoming increasingly well-known for the Kaesong Industrial Complex, a "special economic zone", developed by Hyundai Asan with North Korea. This zone now has over 10,000 North Korean workers in over a dozen brand-new factories owned by South Korean companies.