As one of the major outdoor installations, the City Hall Tower was lit up during and after the Media Architecture Biennale 2012, which took place in Aarhus, Denmark. The project was realized as a collaboration between the Media Architecture Institute (MAI) and Aarhus University/PIT/CAVI, with generous support from AHL Media facades, who sponsored the hardware.

The S25-3 Pixel Type and CP950 controllers from AHL Media facades where used. This turned out to be a very powerful combination. Approximately 5500 pixels were installed along with 4 controllers, 1 on each level of the City Hall Tower. The CP950 could drive 680 pixels per port, and provided 8 ports each. The installation could easily have been done with only two controllers, but that would have caused issues with long cable runs.

The City Hall Tower building was designed by the famous Danish architect, Arne Jacobsen, and has been a landmarked monument since 1994. Therefore, the mounting had to be completely reversible. A very lightweight sub-construction that was simply clipped onto an existing railing was designed. Because of this, the whole installing proces could be completed in approximately 5 days, with a team of 3 people on the tower supported by an ever-changing number of volunteer students. A big “Thank You” to them! The content, which was displayed on the four levels of the tower, was part of the City Bug Report, a system whereby the citizens of Aarhus could report problems in their home town via internet, or via smart phone. Each of the moving circular graphical elements on the constructed screen represents a bug at different stages showing the time passed since reported and bug solution status. Finally, when the problem was resolved, the representation of the bug "died" showing a white fade out of the graphical element.