The first mention of Aalborg under its original name Alabu or Alabur is found on coins from c.
The population grew in parallel with the development of many fine buildings in the city as merchants benefitted from their shipping routes from Norway to Portugal.During the second half of the 18th century, Aalborg entered a further period of prosperity.), is Denmark's fourth largest city with an urban population of 136,000, including 22,000 in the twin city Nørresundby 600 meters across the Limfjord.With a population of 210,316 (as of 1 January 2016 By road Aalborg is 64 kilometres (40 mi) southwest of Frederikshavn, and 118 kilometres (73 mi) north of Aarhus.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 in 1881.
Grey Friar Convent, on the east side of Østerå, was probably built around 1240; it was documented in 1268 when it was a Franciscan Convent of the Order of Friars Minor, but like many other Roman Catholic monasteries and convents was shut down in 1530 as a result of the Reformation.
Aalborg's earliest trading privileges date from 1342, when King Valdemar IV received the town as part of his huge dowry on marrying Helvig of Schleswig.
During the Middle Ages a number of important institutions were established in Aalborg, including Budolfi Cathedral in the late 14th century and the Hospital of the Holy Ghost, a monastery and nunnery founded in 1451 to help those in need.
In 1530 a large part of the town was destroyed by fire, and in December 1534 it was stormed and plundered by the king's troops after a peasants' revolt known as the Count's Feud led by Skipper Clement. From the 1550s to the 1640s, as a result of increased foreign trade, Aalborg enjoyed great prosperity, second only to that of Copenhagen.
Budolfi Church, now a cathedral, dates from the end of the 14th century and Aalborghus Castle, a royal residence, was built in 1550.