I have many intense friendships with artists. I don't mean we have intense one-day conversations but ongoing conversations that last in some cases for years.

One of my favourite exhibitions is called 'Do It,' which I co-curated with the artists Christian Boltanski and Bertrand Lavier 21 years ago.

During my time at high school and university in Kreuzlingen and St. Gallen, I traveled around Europe looking at art, visiting artists, studios, galleries and museums.

For me, the making of exhibitions has always had to do with dialogue: a concentrated, in-depth, focused dialogue with artists, who keep teaching me that exhibitions should always invent new rules for the game.

I really do think artists are the most important people on the planet, and if what I do is a utility and helps them, then that makes me happy. I want to be helpful.

Mr. Koons's work has always inspired architects, which I think is very interesting. I think he is an artist who has reinvented himself so many times and reinvented so many different series.