What and Where Is Seoul?

Seoul is the capital and largest city of South Korea, sitting astride the Han River in the northwestern part of the country. Administered as a special city with its own metropolitan government, Seoul is divided into 25 autonomous districts, or gu, and stretches roughly 30 kilometers from north to south and nearly 35 kilometers from east to west [3]. Within the city limits, the population stood at close to 10 million as of 2020, making Seoul the political, economic, and cultural center of a country of more than 51 million people [3][8].

Origins and Historical Development

A Capital Since 1394

People have lived around what is now Seoul since at least the Neolithic period, with archaeological sites in the city dated to roughly 5,000 BC, and fortified settlements built along the Han River by the 2nd and 3rd centuries AD as the ancient kingdoms of Baekje and Silla contested the region [1]. The site’s decisive turn came in October 1394, when King Taejo, founder of the Joseon dynasty, moved the kingdom’s capital to a location then called Hanyang and ordered the construction of Gyeongbokgung Palace, Jongmyo Royal Ancestral Shrine, and Sajik Altar, the three structures the court used to mark the new capital’s legitimacy [7]. Hanyang’s defensive wall was completed in 1396 and Gyeongbokgung itself in 1404, with Changdeokgung Palace following in 1405 as a second royal residence [1].

Hanyang’s fortunes as a capital were not undisturbed. The city was devastated during the Japanese invasion of 1592, when palaces, shrines, government offices, and private homes were “plundered or burnt to ashes,” and again during the Manchu invasion of 1636 [7]. Gyeongbokgung itself lay in ruins for roughly two and a half centuries after the 1592 invasion; it was not rebuilt until a renovation ordered by the regent Heungseon Daewongun between 1865 and 1868 produced a palace complex of more than 330 buildings [2]. By the late Joseon period Hanyang had also grown into a substantial commercial city, as a new tax and currency system drew merchants, artisans, and wage laborers into its population [7].

Colonial Rule, War, and Rebuilding

Korea came under Japanese colonial administration in 1910, and the city, renamed Gyeongseong, was reshaped with new roads, rail lines, and commercial buildings through the 1920s and 1930s [1]. After Japan’s defeat in 1945 the city reverted to the name Seoul and became the capital of the newly established Republic of Korea [1]. War came to the peninsula from 1950 to 1953, and Seoul, as the capital, was occupied and fought over before the fighting ended in an armistice that left Korea divided into two states, a division that persists today. The city’s own infrastructure bore the marks of that period: its Han River railway bridge, among other structures, was put out of service and did not reopen until 1952, after wartime repairs [1]. Historians and the two Korean governments continue to dispute how the war began and where responsibility for the division lies; what is not disputed is that the capital itself was heavily damaged and that reconstruction afterward reshaped the city almost entirely.

Seoul paved over its central Cheonggyecheon stream between 1958 and 1961, built the country’s first apartment complex in 1961, and opened its first subway line in 1974, with further lines following through the 1980s [1]. The city hosted the 1988 Summer Olympics, and infrastructure built around that period, including the Olympic Expressway, remains in use today [1]. In 2005 Seoul completed a decade-defining public works project when it removed the elevated highway covering Cheonggyecheon and restored the stream as an open waterway through the city center [1].

Culture, Character, and Economy

In 2010, UNESCO designated Seoul a Creative City of Design, part of its Creative Cities Network, citing a concentration of roughly 73 percent of South Korea’s designers within the city and a design sector spanning IT devices, digital appliances, automotive styling, fashion, advertising, architecture, and digital content that supported more than 170,000 jobs [6]. The Dongdaemun Design Plaza, a landmark design and exhibition complex, has become a flagship venue for that creative economy [6]. That density of design, media, and manufacturing activity sits alongside, and often literally on top of, a street grid still shaped by Hanyang’s fifteenth-century fortress walls [1].

Economically, Seoul functions as the headquarters city for a nation whose economy the World Bank measured at roughly 1.87 trillion dollars in 2025, with a national population of about 51.7 million [8]. The capital’s own population, close to 10 million within the city limits as of 2020, means that something on the order of one in five South Koreans live inside Seoul proper, well before counting the much larger metropolitan area that surrounds it [3][8].

Famous Landmarks and Districts

Gyeongbokgung Palace, the Joseon dynasty’s first and primary royal palace, is the building Seoul’s own city government describes as the first image that comes to mind at any mention of Korean palaces [2]. Its throne hall, gates, and pavilions, rebuilt after the regent’s nineteenth-century restoration and set against Bugaksan Mountain to the north, anchor the historic core of the city [2].

Two other royal complexes carry formal UNESCO World Heritage status. Changdeokgung Palace, inscribed in 1997, is prized for its rare integration of palace buildings with their natural topography and for its 57.9-hectare grounds, which include the Biwon rear garden holding more than 56,000 specimens of trees and plants, and which served as the Joseon court’s main residence for roughly 250 years [5]. Jongmyo Shrine, inscribed in 1995, is the oldest and most intact Confucian royal ancestral shrine anywhere, a 19.4-hectare site where descendants of the royal family still perform the Jongmyo Jerye ancestral rites and ritual music each year [4]. Beyond the palaces, the restored Cheonggyecheon stream and the dense commercial districts that have grown up around the old royal core give the modern city its contemporary, consumer-facing face.

What Seoul Is Best Known For

Internationally, Seoul is best known for two things that sit side by side: a well-preserved set of royal Joseon-era palaces and shrines, two of them inscribed as UNESCO World Heritage sites, and a highly compressed, design-driven modern economy that UNESCO has formally recognized in its own right [4][5][6]. The city has been a continuously used seat of government since 1394, interrupted by invasion, colonial rule, and mid-twentieth-century war, and rebuilt repeatedly in the decades since [1][7].

Why Seoul Matters

As the capital of a country whose economy the World Bank places among the world’s largest, Seoul functions as South Korea’s center of government, finance, and increasingly of design and cultural production, a role UNESCO formalized when it named the city a Creative City of Design [6][8]. Its palaces and shrines, two of them inscribed by UNESCO, preserve physical evidence of the Joseon dynasty that governed Korea for five centuries, while the city’s documented reconstruction after colonial rule and war offers a case study of a capital substantially rebuilt within living memory [1][4][5].

Key Takeaways

• Seoul became Korea’s capital in October 1394, when King Taejo moved the Joseon dynasty’s seat of government to the site then called Hanyang [1][7].
• The city’s population stood at close to 10 million in 2020 across 25 districts [3].
• Gyeongbokgung Palace, the dynasty’s first royal palace, burned during the 1592 Japanese invasion and sat in ruins for roughly two and a half centuries before being rebuilt in 1865-1868 [2][7].
• Two Seoul landmarks, Changdeokgung Palace Complex and Jongmyo Shrine, are UNESCO World Heritage sites, inscribed in 1997 and 1995 respectively [4][5].
• UNESCO designated Seoul a Creative City of Design in 2010, citing a design sector supporting more than 170,000 jobs and about 73 percent of the country’s designers [6].
• War divided the Korean peninsula between 1950 and 1953, leaving Seoul heavily damaged; the division remains unresolved today [1].
• South Korea’s economy was valued at about 1.87 trillion dollars in 2025, with Seoul as its political and economic capital [8].

Sources

1. Seoul Metropolitan Government. History, historical place of seoul. Undated. https://english.seoul.go.kr/seoul-views/meaning-of-seoul/1-history/
2. Seoul Metropolitan Government. Telling the stories and revealing the culture preserved within the palaces at the heart of Seoul. Undated. https://english.seoul.go.kr/telling-stories-revealing-culture-preserved-within-palaces-heart-seoul/
3. Seoul Metropolitan Government (Seoul Solution). The Statistic of Seoul. Undated. https://www.seoulsolution.kr/en/content/statistic-seoul
4. UNESCO World Heritage Centre. Jongmyo Shrine. Inscribed 1995. https://whc.unesco.org/en/list/738/
5. UNESCO World Heritage Centre. Changdeokgung Palace Complex. Inscribed 1997. https://whc.unesco.org/en/list/816/
6. UNESCO Creative Cities Network. Seoul. Designated 2010. https://www.unesco.org/en/creative-cities/seoul
7. Seoul Museum of History. Permanent Exhibition: The Joseon Capital. Undated. https://museum.seoul.go.kr/eng/exhibition/permanent/permExhibit/permExhibit1.jsp
8. World Bank. World Bank Open Data: Korea, Rep.. 2025 figures. https://data.worldbank.org/country/KR

Editorially reviewed by Specialty Digest Editorial TeamLast reviewed October 6, 2026Researched and drafted with AI assistanceReport an issue