Aalborg () also known as Ålborg, is Denmark's fourth largest town (behind Copenhagen, Aarhus, and Odense) with a population of 119,862 (1 July 2022) in the town proper and an urban population of 143,598 (1 July 2022). As of 1 July 2022, the Municipality of Aalborg had a population of 221,082, making it the third most populous in the country after the municipalities of Copenhagen and Aarhus. Eurostat and OECD have used a definition for the Metropolitan area of Aalborg (referred to as a Functional urban area), which includes all municipalities in the Province (Danish: landsdel) of North Jutland (Danish: Nordjylland), with a total population of 594,323 as of 1 July 2022. By road Aalborg is southwest of Frederikshavn, and north of Aarhus. The distance to Copenhagen is if travelling by road and not using ferries. The earliest settlements date to around AD 700. Aalborg's position at the narrowest point on the Limfjord made it an important harbour during the Middle Ages, and later a large industrial centre. Architecturally, the city is known for its half-timbered mansions built by its prosperous merchants. Budolfi Church, now a cathedral, dates from the end of the 14th century and Aalborghus Castle, a royal residence, was built in 1550. Today, Aalborg is a city in transition from a working-class industrial area to a knowledge-based community. A major exporter of grain, cement, and liquors, its thriving business interests include Siemens Wind Power, Aalborg Industries, and Aalborg Portland. These companies have become global producers of wind turbine rotors, marine boilers, and cement. With its theatres, symphony orchestra, opera company, performance venues, and museums such as Aalborg Historical Museum and the Aalborg Museum of Modern Art, Aalborg is an important cultural hub. The Aalborg Carnival, held at the end of May, is one of the largest festivals in Scandinavia, attracting some 100,000+ people annually. The town's major university is Aalborg University (often abbreviated to AAU), founded in 1974, which has more than 20,000 students (as of 2018). AAU is also North Jutland's largest university and overall academic institution. The University College of Northern Denmark (UCN) is one of seven new regional organisations while the Royal School of Library and Information Science (RSLIS) provides higher education in library and information science. Trænregimentet, the Danish regiment for army supply and emergency medical personnel, is also in Aalborg. Aalborg University Hospital, the largest in the north of Jutland, was founded