In 1967, having witnessed the horrors of a war and the lasting of craziness still evident in mid Europe, he applied for the permission to paint forty meters of the Berlin Wall, on both sides.
He obtained the agreement from the Western Germany, but the denial from the Eastern authorities put an end to the project.
Some of the preparatory studies have been rescued from his destructive disillusion.
In 1989, twenty years later, the world celebrated the fall of the Wall.