one of the leading printing press companies in the Baltics. At the beginning of the 21st century, many ICT enterprises and other high-tech companies have taken a foothold in Tartu. Notable examples include Playtech Estonia, Nortal (formerly Webmedia Group), ZeroTurnaround, Tarkon, Reach-U and Raintree Estonia. Skype has an office in Tartu. The university is one of the largest employers, which explains the large proportion of highly skilled professionals – researchers, professors, doctors, and Tartu University Clinic has been considered the largest employer of Tartu. Transport The city is served by Tartu Airport. The distance to Estonia's "summer holiday capital", Pärnu (in the western Estonia) is and the fastest route there by road is through Viljandi and Kilingi-Nõmme. Tartu is connected to Riga, Tallinn, and other Estonian towns by many bus and train routes. Population Tartu's historic population is presented in the following table, based on data from official censuses since 1881 and Estonian Statistical Office. Note that the data up to 2011 is not directly comparable to the most recent numbers, as the methodology of compiling population statistics has changed. Religion Neighbourhoods Tartu is officially divided into 17 neighbourhoods, which carry no administrative purposes. Their names and borders are defined. Education and culture The city is best known for being home to the University of Tartu (formerly known as the University of Dorpat; ), founded under King Gustavus Adolphus of Sweden in 1632. Mainly for this reason, Tartu is also – tongue-in-cheek – known as "Athens of the Emajõgi" or as "Heidelberg of the North". Tartu is also the seat of the Estonian University of Life Sciences, the Baltic Defence College, Estonian Aviation Academy (formerly known as Tartu Aviation College), and the Estonian Ministry of Education and Research. Other notable institutions include the Supreme Court of Estonia (re-established in Tartu in autumn 1993), the Estonian Historical Archives, Estonian National Museum, Estonian Sports and Olympic Museum as well as the oldest and renowned theatre in the country, Vanemuine, where they have a well-respected ballet company as well as theatre, opera and musical productions. In music, there exists the Tartu school of composition. Most of the sculptures in Tartu are dedicated to historical figures. Among them the most famous are the Barclay de Tolly monument on the Barclay Square in downtown, the Kissing Students monument on the town hall square and Gustav II Adolf´s monument on the Kuningaplats. Science Tartu has been