Map - Zelenogorsk, Saint Petersburg (Zelenogorsk)

Zelenogorsk (Zelenogorsk)
Zelenogorsk (Зеленого́рск), officially known as Terijoki prior to 1948 (a name still used in Finnish and Swedish), is a municipal town in Kurortny District of the federal city of St. Petersburg, Russia, located in part of the Karelian Isthmus on the shore of the Gulf of Finland. Population:

It has a station on the St. Petersburg-Vyborg railroad. It is located about 50 km northwest of central Saint Petersburg.

From 1323 to 1721 the Zelenogorsk area was a part of Sweden. It was ceded to Russia in 1721, becoming "Old Finland", which again was united with the Grand-Duchy of Finland in 1811. Until 1917, Terijoki was part of the Grand-Duchy of Finland, ruled by the Grand Dukes of Finland, who were the Tsars of Russia, (1812–1917).

Even though all of Finland was part of the Russian Empire, a customs border was located at Terijoki. A valid passport was needed for crossing the border between Russia and the Grand Duchy of Finland.

Vladimir Lenin managed to travel in secrecy over the internal border to Finland in 1907. Ten years later, in April 1917, he would return through the Terijoki border control at the head of the contingent of Bolshevik exiles that had accompanied him from Switzerland.

With completion of the Riihimäki–Saint Petersburg railway in 1870, Terijoki become a popular summer resort, and was frequented by St. Petersburg's upper class until closure of the border during the Russian Revolution (1917).

When the Republic of Finland gained independence on 6 December 1917, Terijoki became a part of it, and remained so until it was occupied by the Soviet Union during the Winter War (1939-1940). It was regained by Finland in 1941 during the Continuation War (1941-1944), but was then occupied again by the Red Army during the later stages of the same war and annexed to the Soviet Union in 1944.

During the Winter War Terijoki become known as the seat of Otto Wille Kuusinen's Finnish Democratic Republic.

After the Second World War, its original Finnish population was expelled. They were relocated close to Helsinki and Soviet citizens were relocated to Terijoki. Around the start of the 21st century, the town's population was estimated to have been a few thousand, rising to above 50,000 in summer.

 
Map - Zelenogorsk (Zelenogorsk)
Country - Russia
Flag of Russia
Russia (Россия,, ), or the Russian Federation, is a transcontinental country spanning Eastern Europe and Northern Asia. It is the largest country in the world, with its internationally recognised territory covering 17098246 km2, and encompassing one-eighth of Earth's inhabitable landmass. Russia extends across eleven time zones and shares land boundaries with fourteen countries. It is the world's ninth-most populous country and Europe's most populous country, with a population of 146 million people. The country's capital and largest city is Moscow. Saint Petersburg is Russia's cultural centre and second-largest city. Other major urban areas include Novosibirsk, Yekaterinburg, Nizhny Novgorod, and Kazan.

The East Slavs emerged as a recognisable group in Europe between the 3rd and 8th centuries CE. The first East Slavic state, Kievan Rus', arose in the 9th century, and in 988, it adopted Orthodox Christianity from the Byzantine Empire. Rus' ultimately disintegrated, with the Grand Duchy of Moscow growing to become the Tsardom of Russia. By the early 18th century, Russia had vastly expanded through conquest, annexation, and the efforts of Russian explorers, developing into the Russian Empire, which remains the third-largest empire in history. However, with the Russian Revolution in 1917, Russia's monarchic rule was abolished and replaced by the Russian SFSR—the world's first constitutionally socialist state. Following the Russian Civil War, the Russian SFSR established the Soviet Union (with three other Soviet republics), within which it was the largest and principal constituent. At the expense of millions of lives, the Soviet Union underwent rapid industrialization in the 1930s, and later played a decisive role for the Allies of World War II by leading large-scale efforts on the Eastern Front. With the onset of the Cold War, it competed with the United States for global ideological influence; the Soviet era of the 20th century saw some of the most significant Russian technological achievements, including the first human-made satellite and the first human expedition into outer space.
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