|The modern city of Aarhus|
|The Aarhus River is flowing through the inner city of Aarhus and ends in Aarhus Habour.|
The city itself is presumably older than 770 AD, making Aarhus the oldest big city in Scandinavia.
|A model of Aros, the fortified Viking town around 950 AD|
During the Middle Ages the city was called Arus, and in Icelandic chronicles, it was known as Áróss. It is a compound of the two words ār, genitive of ā ("river", Modern Danish å) and ōss ("mouth", Modern Danish munding).
Aros is also a river that ran through Beleriand in J. R. R. Tolkien's Middle-earth legendarium.