Going Zusa hunting is a joy in itself. The letters, which mean Zusammen ('together' in German), are created and painted by the street artist, Anders Thordal. He's been part of the Copenhagen street art movement since the 1980’s. He got MS at the age of 28 and became wheelchair bound. He is still very much active, and has helpers who help him erect the art.
The four letters have become very popular, and are too often stolen, leaving just the shadow of the letters behind.