This entire area in full of street art and graffiti - all on legal walls. This specific wall is the most active and changing wall in the area and you never know when the street art is going to change - but you can always be certain that there is some! Sometimes it is quite graffiti-like and other times it is very artistic.
To get a better idea of this area and its vibes, take a stroll in the area - it is never boring and there is much more street art than is shown here on Street Art Cities. You can also look at http://grandts.dk/Aarhus/godsbanen.htm