D-tower is an art piece, commissioned by the city of Doetinchem in the Netherlands, that tries to map the emotions of the inhabitants of Doetinchem.

The project consists of the tower, a questionnaire and a web site that are interactively related. The questionair deals with everyday emotions like hate, love, happiness and fear. These four emotions are represented by four colors, green, red, blue and yellow, and determine the colors of the lamps illuminating the building.

At night time, one can supposedly see which emotion is most deeply felt on that day. Unless, of course, someone has been lying.

The D-tower is conceived by artist Q.S. Serafijn and architect Lars Spuybroek / NOX-Architekten in collaboration with the Rotterdam based v2-lab.

• D-Tower