founded in 1832 and is operating in its current building since 1939. Another national library of Yerevan is the Khnko Aper Children's Library, founded in 1933. Other major public libraries include the Avetik Isahakyan Central Library founded in 1935, the Republican Library of Medical Sciences founded in 1939, the Library of Science and Technology founded in 1957, and the Musical Library founded in 1965. In addition, each administrative district of Yerevan has its own public library (usually more than one library). The Matenadaran is a library-museum and a research centre, regrouping 17,000 ancient manuscripts and several bibles from the Middle Ages. Its archives hold a rich collection of valuable ancient Armenian, Ancient Greek, Aramaic, Assyrian, Hebrew, Latin, Middle and Modern Persian manuscripts. It is located on Mashtots Avenue at central Yerevan. On 6 June 2010, Yerevan was named as the 2012 World Book Capital by the United Nations Educational, Scientific and Cultural Organization (UNESCO). The Armenian capital was chosen for the quality and variety of the programme it presented to the selection committee, which met at UNESCO's headquarters in Paris on 2 July 2010. The National Archives of Armenia founded in 1923, is a scientific research centre and depositary, with a collection of around 3.5 million units of valuable documents. Art Yerevan is one of the historic centers of traditional Armenian carpet. Various rug fragments have been excavated in areas around Yerevan dating back to the 7th century BCE or earlier. The tradition was further developed from the 16th century when Yerevan became the central city of Persian Armenia. However, carpet manufacturing in the city was greatly enriched with the flock of Western Armenian migrants from the Ottoman Empire throughout the 19th century, and the arrival of Armenian refugees escaping the genocide in the early 20th century. Currently, the city is home to the Arm Carpet factory opened in 1924, as well as the Tufenkian handmade carpets (since 1994), and Megerian handmade carpets (since 2000). The Yerevan Vernissage open-air exhibition-market formed in the late 1980s on Aram Street, features a large collection of different types of traditional Armenian hand-made art works, especially woodwork sculptures, rugs and carpets. On the other hand, the Saryan park located near the opera house, is famous for being a permanent venue where artists exhibit their paintings. The Armenian Center for Contemporary Experimental Art founded in 1992 in Yerevan, is a creativity centre helping to exchange