city, port, and seat of Nordjylland amtskommune (county), northern Jutland, Denmark, on the south side of Limfjorden. It has existed since about AD 1000 and is one of the oldest towns in Denmark. Chartered in 1342, it became a bishop's see in 1554. The town recovered slowly from the Count's War (a religious civil war, 1533-36) to become a major commercial centre in the 17th century and was Denmark's second largest city until about 1850. It is the site of the Danish surrender (1629) to Albrecht von Wallenstein (the Roman Catholic commander) during the Thirty Years' War.
Learn more about Aalborg with a free trial on Britannica.com.