Helsinki was founded in 1550 by Swedish king Gustav Vasa. The king longed to create a rival to the Hansa trading town of Tallin, the present-day capital of Estonia. By royal decree traders from Ekenäs and a few other towns were bundled off to the newly founded settlement, known as Helsingfors. However, for more than 200 years Helsinki remained a backwater market town on a windy, rocky peninsula. Then, in 1809, Russia annexed Finland from the decaying Swedish empire. A capital closer to St Petersburg was needed to keep a better watch on Finland's domestic politics. Helsinki was chosen - in large part because of the massive sea fortress, now called Suomenlinna, just outside the harbor.

In the 19th and early 20th centuries, Helsinki grew rapidly in all directions. Railway construction helped the city become an affluent industrial center, and grand art nouveau buildings reflected that wealth. The arts also flourished at the turn of the 20th century, with noted composer Jean Sibelius leading a renaissance of Finnish culture. The Communist revolution of October 1917 enabled Finland to declare independence from Russia. The jubilation was short-lived, however, as the country was plunged into a bloody civil war. The nationalists prevailed in 1918, and Helsinki developed quickly to become a world-class capital. It suffered Russian bombing during WWII, but in the postwar period Helsinki recovered and went on to host the Olympic Games in 1952. In the 1970s and 80s, many new suburbs were built around Helsinki. Helsinki has served as an international conference venue on numerous occasions for everything from weighty economic summits to the World Dog Show. It has become a major technology center and one of Europe's fastest-growing cities.