Minsk , is the capital and largest city in Belarus, situated on the Svislach and Niamiha rivers. Minsk is also a headquarters of the Commonwealth of Independent States (CIS). As the national capital, Minsk has a special administrative status in Belarus and is also the administrative centre of Minsk voblast (province) and Minsk raion. The earliest references to Minsk date to the 11th century (1067), then a provincial city within the principiality of Polotsk. In 1242, Minsk became a part of the Grand Duchy of Lithuania, and it received its town privileges in 1499. From 1569, it was a capital of the Minsk Voivodship in the Polish-Lithuanian Commonwealth. It was annexed by Russia in 1793, as a consequence of the Second Partition of Poland. From 1919–1991, Minsk was the capital of the Byelorussian SSR. Minsk is located on the southeastern slope of the Minsk Hills, a region of rolling hills running from the southwest (upper reaches of the river Nioman) to the northeast - that is, to the Lukomskaye lake in northwestern Belarus. Minsk is the economic capital of Belarus. It has developed industrial and services sectors which serve the needs not only of the city, but of the entire nation. Minsk has an extensive public transport system. Passengers are served by 8 tramway lines, over 70 trolleybus lines, and over 100 bus lines. Tram is the first public transport used in Minsk (since 1892 - horse-tram, and since 1929 - electric tram). Public buses are in use in Minsk since 1924, and trolleybuses - since 1952. Minsk is the only city in Belarus with an underground metro system. Minsk is the largest transportation hub in Belarus. It is located on the junction of Warsaw-Moscow railway (built in 1871) running from the south-west to the north-east of the city and Liepaja-Romny railway (built in 1873) running from the north-west to the south. The first railway connects Russia with Poland and Germany, the second connects Ukraine with Lithuania and Latvia. Minsk International Airport is located 42 km to the east of the city. It opened in 1982 (passenger terminal - in 1987.) It is an international airport undergoing modernisation with flights to Austria, Cyprus, France, Germany, Ireland, Israel, Italy, Iran, Latvia, Poland, Russia, Turkey, United Kingdom, and other countries. Minsk is the major educational centre of Belarus. It has over 500 nursery schools, 258 schools, 28 further education colleges, and 36 higher education institutions, including 12 major national universities (most specialising in certain areas of science and technology). Minsk is the major cultural centre of Belarus. Its first theatres and libraries were established in the middle of the 19th century. Now it has 11 theatres and 16 museums. There are 20 cinemas and 139 libraries. Minsk is the major industrial centre of Belarus. The city has over 250 factories and plants. Its industrial development started in the 1860s and was facilitated by the railways built in the 1870s. However, much of the industrial infrastructure was destroyed during World War I and especially during World War II. After the last war the development of the city was linked to the development of industry, especially of R&D-intensive sectors (heavy emphasis of R&D intensive industries in urban development in the USSR is known in Western geography as 'Minsk phenomenon'). Minsk was turned into a major production site for trucks, tractors, gears, optical equipment, refrigerators, television sets and radios, bicycles, motorcycles, watches, and metal-processing equipment. Outside machine-building and electronics, Minsk also had textiles, construction materials, food processing, and printing industries.