This striking piece is the collaborative effort of Kärcher and the internationally acclaimed artist, Klaus Dauven.

The technique used to create this masterpiece is as fascinating as the art itself - reverse graffiti, a method involving the use of high-pressure cleaners. With careful precision, Kärcher's high-pressure cleaners were utilized to etch a beautifully detailed image into the dam's surface.

The artwork stands as a testament to the workers who tirelessly labored between 1950 and 1964 to construct the Vianden dam. Now, their efforts are immortalized on the very structure they helped create. This artistic homage is a powerful celebration of their contribution, visible for all who visit the dam to appreciate.

Explainer: Reverse graffiti

Reverse graffiti, also known as clean tagging, is an art method that creates images by cleaning dirt and grime off surfaces rather than applying paint or other materials. Artists typically use high-pressure washers to selectively clean areas of a surface, leaving a contrasting image or design. This eco-friendly art form turns accumulated grime into a canvas for creative expression.