In the 900s an earth rampart for the defence of the early city was constructed, encircling the settlement, much like the defence structures found at Viking ring fortresses elsewhere.

The rampart was later reinforced by Harald Bluetooth, and together with the town's geographical placement, this suggests that Aros was an important trade and military centre.

dating for unge under 18 Herning-1dating for unge under 18 Herning-18

Archaeologists have conducted several excavations in the inner city since the 1960s revealing wells, streets, homes and workshops.

In the buildings and adjoining archaeological layers, everyday utensils like combs, jewellery and basic multi-purpose tools from approximately the year 900 have been found.

Market town privileges were granted in 1441, but growth stagnated in the 17th century as the city suffered blockades and bombardments during the Swedish Wars.

In the 19th century it was occupied twice by German troops during the Schleswig Wars but avoided destruction.

In 2010, the city council voted to change the name from "Århus" to "Aarhus" to strengthen the international profile of the city. Certain geographically affiliated names have been updated to reflect the name of the city, such as the Aarhus River, changed from "Århus Å" to "Aarhus Å".

It is still grammatically correct to write geographical names with the letter Å and local councils are allowed to use the Aa spelling as an alternative.

In the 1970s and 1980s, Aarhus became the centre for Denmark's rock music fostering many iconic bands such as TV-2 and Gnags.

Aarhus is home to the annual eight-day Aarhus International Jazz Festival, the SPo T Festival and the North Side Festival.

It is notable that the "Aa" spelling has been in use the longest.