Because we do not sell photographs, we have no royalties on books, posters, postcards.

We don't sell technical drawings except when they are incorporated into a drawing or a collage.

It appears to be monumental only because it's art.

That could stay, not forever, because we believe that nothing exists that is forever, not even the dinosaurs, but if well maintained, it could remain for four to five thousand years. And that is definitely not forever.

Now, to describe the process of the Wrapped Reichstag, which went from 1971 to '95, there is an entire book about that, because each one of our projects has its own book. The book is not an art book, meaning it's not written by an art historian.

And for every project, because it takes years, you can see the early drawings and collages as just a simple, vague idea, and through the years and through the negotiations of getting the permit, you see that every detail is now clarified.