Reykjavík

City · 1786 CE · in Europe

Capital of Kingdom of Iceland (1918–1939), Republic of Iceland (1946–today).

Bukittinggi (1784 CE): Capital of Republic of Indonesia (1948–1950).
Windsor (c. 1783 CE): Capital of Vermont Republic (1783–1790).
Bangkok (1782 CE): King Rama I founded the Chakri dynasty and moved the Siamese capital to Rattanakosin Island in 1782; Bangkok is now Thailand's capital.
Washington, D.C. (1790 CE): Federal capital of the United States, created by the Residence Act of 1790 on the Potomac River and designed by Pierre L'Enfant.
Georgetown (1781 CE): Capital of Guyana (1967–today).
Maputo (1781 CE): Capital of Mozambique (1976–today).
Danville (1792 CE): Capital of Confederate States of America (1861–1865).
Quy Nhon (c. 1778 CE): Capital of Tây Son dynasty (1778–1789).
Tehran (1794 CE): Capital of Pahlavi Dynasty (1925–1978), Islamic Republic of Iran (1979–today).
Hilo (c. 1796 CE): Capital of Kingdom of Hawaï'i (1796–1802).

Around the same time and place

Adam Smith (1723 CE – 1790 CE): Scottish economist and moral philosopher of the Scottish Enlightenment whose The Wealth of Nations (1776) laid the foundations of classical economics.
The Wealth of Nations (1776 CE): Scottish economist Adam Smith published this foundational work of classical economics in 1776, arguing for the division of labour and free markets.
Laki eruption (1783–1784 CE): An eight-month fissure eruption in Iceland in 1783–1784 released vast amounts of fluorine and sulphur dioxide. The resulting famine killed about a fifth of Iceland's population.