Kaesong (UKkeɪˈsɒŋ, USkeɪˈsɔːŋ; kɛsʌ̹ŋ) is a special city in the southern part of North Korea (formerly in North Hwanghae Province), and the capital of Korea during the Taebong kingdom and subsequent Goryeo dynasty. The city is near the Kaesong Industrial Region close to the border with South Korea and contains the remains of the Manwoldae palace. Called Songdo while it was the ancient capital of Goryeo, the city prospered as a trade centre that produced Korean ginseng. Kaesong now functions as North Korea's light industry centre.
During the Japanese occupation from 1910 to 1945, the city was known by the Japanese pronunciation of its name, "Kaijō". Between 1945 and 1950, Kaesong was part of South Korea and under its control. During the Korean War, North Korea captured the city, and the 1953 Korean Armistice Agreement left the city under North Korean control. Due to the city's proximity to the border with South Korea, Kaesong has hosted cross-border economic exchanges between the two countries as well as the jointly run Kaesong Industrial Region.
As of 2009, the city had a population of 192,578.
The earliest archaeological signs of habitation in the Kaesong area date from the Neolithic. Artifacts such as Jeulmun pottery, stone ware, and stone axes have been excavated from Osongsan and Kaesong Nasong, the double-walled fortress of Kaesong. As Kaesong has been occupied by various states throughout centuries, its name has changed. It was in the realm of Mahan confederacy, and was referred to as Busogap during the rule of Goguryeo. Before the strength of Baekje was retreated to the southwest of Jungnyeong, Mungyeong Saejae, and Asan Bay in 475, the area had been a part of Baekje for about 100 years.
However, it became a territory of Silla in 555, the 16th year of Jinheung of Silla's reign, and its name was changed to Song'ak-gun during the period. According to the Samguk Sagi, when a castle was built in the site in 694, the third year of Hyoso of Silla's reign, Kaesong was referred to as "Song'ak (송악; 松嶽)".