Klosterneuburg (kloːstɐˈnɔɪ̯bʊʁk), frequently abbreviated to Kloburg by locals, is a town in the Tulln District of the Austrian state of Lower Austria. It has a population of about 27,500. The Stift Klosterneuburg (Klosterneuburg Monastery), which was established in 1114 and soon after given to the Augustinians, is of particular historical importance. It is located on the Danube, immediately north of the Austrian capital Vienna, from which it is separated by the Kahlenberg and Leopoldsberg hills of the Vienna Woods range. It has been separated from its twin city of Korneuburg on the opposite bank of the Danube since the river changed course during the Late Middle Ages. The towns are connected by a reaction ferry link which runs during daylight hours from Spring to late Autumn. The municipal area comprises the northern tip of the Donauinsel as well as the high Mt. Exelberg and its telecommunication tower. On the site of a former pioneer school of the Austrian Army Austrian Bundesheer are a variety of buildings due to be developed into a 12-hectare new town quarter by 2030. Klosterneuburg is also the centre of a wine growing area, with several esteemed vintners, numerous Heuriger wine taverns and the Federal Institute for Viticulture and Pomology Weinbauschule, where Fritz Zweigelt bred the Zweigelt and Blauburger red wine grapes. Due to its hilly location, Klosterneuburg consists of several geographical areas within the cadastral communities of Klosterneuburg-Stadt, Maria Gugging, de, de, de, de, and de. Its town centre has two main shopping areas - the Niedermarkt and the Rathausplatz - which are separated by a steep hill. The town is tightly linked to the Austrian capital and is thought to house some of Lower Austria's most affluent citizens . It has direct access to Vienna via the Klosterneuburger Straße highway (B14), the Vienna S-Bahn network running on the Emperor Franz Joseph Railway line (S40) from Franz-Josefs-Bahnhof to Tulln, and along the EV6 The Rivers cycle route.