paragraph_text: Treaty of Aynalıkavak was a treaty between Ottoman Empire and Russian Empire signed on March 10, 1779. The formal name is Aynalıkavak bond of arbitration (). Aynalıkavak is a palace in Istanbul where the treaty was signed.

paragraph_text: In 1820-1830’s the Ottoman Empire endured a number of strikes which challenged the existence of the country. The Greek Uprising (began in the spring of 1821) evidenced internal and military weakness of Ottoman Empire and caused severe atrocities by Ottoman military forces (see Chios massacre). The disbandment of the centuries-old Janissary corps by Sultan Mahmud II on 15 June 1826 (Auspicious Incident) was a good deed for the country in the longer term, but it has deprived the country from its army forces for the nearest future. In 1827 the allied Anglo-Franco-Russian fleet destroyed almost all the Ottoman naval forces during the Battle of Navarino. In 1830 Greece becomes an independent state after 10 years of independence war and the Russo-Turkish War of 1828–1829. According to the Treaty of Adrianople (1829) Russian and European commercial ships were authorized to freely pass through Black Sea straits, Serbia received autonomy, and Danubian Principalities (Moldavia and Walachia) became the territories under Russian protection.

paragraph_text: The Alaska Purchase (Russian: Продажа Аляски, tr. Prodazha Alyaski) was the United States' acquisition of Alaska from the Russian Empire on March 30, 1867, by a treaty ratified by the United States Senate, and signed by President Andrew Johnson.

paragraph_text: As the Grand Duchy of Finland was part of the Russian Empire from 1809 to 1918, a number of Russian speakers have remained in Finland. There are 33,400 Russian-speaking Finns, amounting to 0.6% of the population. Five thousand (0.1%) of them are late 19th century and 20th century immigrants or their descendants, and the remaining majority are recent immigrants who moved there in the 1990s and later.[citation needed] Russian is spoken by 1.4% of the population of Finland according to a 2014 estimate from the World Factbook.

paragraph_text: Vladimir Karapetoff (January 8, 1876 in Saint Petersburg, Russian Empire – January 11, 1948) was a Russian-American electrical engineer, inventor, professor, and author.

paragraph_text: Roine is a medium-sized lake in Finland. The lake is located in the Pirkanmaa region, mostly in the municipality of Kangasala and for a lesser part in the municipality of Pälkäne.

paragraph_text: Potapy Emelianov (1884, Ufa, Guberniya, Russian Empire – 14 August 1936, Karelian ASSR, USSR) was a Russian Catholic priest and confessor who entered into communion with Rome from the Old Ritualist tradition of Russian Orthodoxy with his entire parish.

paragraph_text: Paul Armont (1874–1943) was a Russian-born French playwright and screenwriter. He also collaborated with the Swiss writer Marcel Gerbidon. He was born Dimitri Petrococchino in Rostov in the Russian Empire.

paragraph_text: Irène Mélikoff (7 November 1917 – 8 January 2009) was a Russian-born French Turkologist with Azerbaijani ancestry. She was born in Petrograd, Russian Empire.

paragraph_text: Austria-Hungary was a multinational state and one of Europe's major powers at the time. Austria-Hungary was geographically the second-largest country in Europe after the Russian Empire, at , and the third-most populous (after Russia and the German Empire). The Empire built up the fourth-largest machine building industry of the world, after the United States, Germany, and the United Kingdom. Austria-Hungary also became the world's third largest manufacturer and exporter of electric home appliances, electric industrial appliances and power generation apparatus for power plants, after the United States and the German Empire.

paragraph_text: Swedish Ingria (, ‘land of Ingrians’) was a dominion of the Swedish Empire from 1583 to 1595 and then again from 1617 to 1721, when it was ceded to the Russian Empire in the Treaty of Nystad.

paragraph_text: At the beginning of World War I, East Prussia became a theatre of war when the Russian Empire invaded the country. The Russian Army encountered at first little resistance because the bulk of the German Army had been directed towards the Western Front according to the Schlieffen Plan. Despite early success and the capture of the towns of Rastenburg and Gumbinnen, in the Battle of Tannenberg in 1914 and the Second Battle of the Masurian Lakes in 1915, the Russians were decisively defeated and forced to retreat. The Russians were followed by the German Army advancing into Russian territory.

paragraph_text: Bogdan Petrovich Gordeev (; June 21, 1894, Kharkiv, Kharkov Governorate, Russian Empire - September 7, 1914), also known as Bozhidar (), was a Russian futurist poet of Ukrainian origin.

paragraph_text: Angel Ivanovich Bogdanovich (, October 14 [o.s. 2], 1860, Vitebsk Governorate, Russian Empire (modern Belarus) - April 6 [o.s. March 24], 1907, Saint Petersburg, Russian Empire) was a Russian literary critic, publicist and social activist, originally a narodnik, later an active member of the Legal Marxists' political group.

paragraph_text: The Nihilist is a 1905 American short silent film directed by Wallace McCutcheon, Sr.. It takes place in the Russian Empire and relates the story of a woman who joins the Nihilist movement and commits a suicide attack against the Governor's palace to avenge her husband who died because of police repression.

paragraph_text: The Russian Empire (Russian: Россійская Имперія, tr. Rossiyskaya Imperiya) or simply Russia (Russian: Россія, tr. Rossiya) was an empire that existed across Eurasia and North America from 1721, following the end of the Great Northern War, until the Republic was proclaimed by the Provisional Government that took power after the February Revolution of 1917.

paragraph_text: Father Nicholas Bock (), SJ (13 November 1880, Saint Petersburg, Russian Empire – 27 February 1962, New York City, United States) was a Russian diplomat who later became a Catholic priest.

paragraph_text: The Kazan Governorate (; ; , "Husan kĕperniĕ"), or the Government of Kazan, was a governorate (a "guberniya") of the Tsardom of Russia, the Russian Empire, and the Russian SFSR from 1708–1920, with its seat in the city of Kazan.

paragraph_text: Saint Petersburg Governorate (, "Sankt-Peterburgskaya guberniya"), or Government of Saint Petersburg, was an administrative division (a "guberniya") of the Tsardom of Russia, the Russian Empire, and the Russian SFSR, which existed during 1708–1927.

paragraph_text: All Summer and Winter Olympic medals of the Soviet Union and the Russian Empire were inherited by Russia, but not combined together with the medal count of the Russian Federation.

Question: The Russian empire was joined by the country containing Lake Roine when?
Answer: 1809