Gija Joseon was purportedly founded in the 12th century BC, but its existence and role have been controversial in the modern era. Three of the commanderies fell or retreated westward within a few decades. As Lelang commandery was destroyed and rebuilt around this time, the place gradually moved toward Liadong.
Media playback is unsupported on your device Media captionThe moment Kim Jong-un crossed into South Korea Kim Jong-un has pledged a "new history" in relations with his neighbour as he became the first North Korean leader to set foot in South Korea since the end of the Korean War in Mr Kim said it was the "starting point" for peace, after crossing the military line that divides the peninsula.
It comes just months after warlike rhetoric from North Korea.
Much of what the summit will focus on has been agreed in advance, but many analysts remain sceptical about the North's apparent enthusiasm for engagement.
The leaders were met on Friday by an honour guard in traditional costume on the South Korean side. The pair walked to the Peace House in Panmunjom, a military compound in the demilitarised zone DMZ between the two countries.
Kim's route to the talks Mr Kim then invited the South Korean president to step briefly across the demarcation line into North Korea, before the pair stepped back into South Korea - all the while holding hands.
It was an apparently unscripted moment during a highly choreographed sequence of events. Image copyright Getty Images Image caption The meeting is aimed at ending the decades-long conflict on the peninsula When the first session ended, the pair separated for lunch and Mr Kim returned to the North in a heavily guarded black limousine.
Diplomacy on the menu: How food can shape politics When he returned in the afternoon, the leaders took part in a ceremony consisting of the planting of a pine tree using soil and water from both countries. The pair shovelled soil on the roots of the tree and unveiled a stone marker featuring their names, official titles and a message that read: The banquet will be held on the South's side and the menu is as symbolic as the other rituals.
Mr Kim is accompanied by nine officials, including his powerful and influential sister Kim Yo-jong. The confidantes Kim is bringing to the summit Why is this important?
The meeting - the first between Korean leaders in more than a decade - is seen as a step toward possible peace on the peninsula and marks the first summit of its kind for Mr Kim.
Image copyright Getty Images Image caption It is the first time Korean leaders have met in more than a decade It carries promise for both Koreas with topics being discussed ranging from nuclear technology and sanctions to separated families, and is seen as an opportunity to foster economic co-operation.History of North Korea A.D: The bombing campaigns reduced Pyongyang to rubble, and North Korea’s population was reduced by 10%.
June 27, Both sides eventually signed the armistice ending major hostilities in The DMZ (demilitarized zone) was established at almost the same position as the border before war broke out. An important light industry center in North Korea, Sinuiju has a plant manufacturing ironware and other industrial goods.
Much of North Korea's trade with China takes place through Sinuiju. April - North Korea says it will restart all facilities at its main Yongbyon nuclear complex and briefly withdraws its 53,strong workforce from the South-Korean-funded Kaesong joint.
15th century. The Joseon Dynasty under the reign of Sejong the Great was Korea's greatest period of scientific advancement. In the first half of the 15th century, around 62 major accomplishments were made in various scientific fields.
Most of North Korea is a series of medium-sized mountain ranges and large hills, separated by deep, narrow valleys.
The highest peak, Paektu-san on the volcanic Baekdu Mountain, is located on its northern border with China, and rises 9, ft. (2, m. GEOGRAPHY Korea is a mile-long (1,kilometer-long) peninsula located in the easternmost part of the Asian continent.
Today, the country is split into South and North Korea, but in the minds of most of its citizens, it remains a single nation that cannot be divided.