In the past Berlin was much more radical and extreme and now it's becoming much more of a conventional European city.

By bringing Little Sun to Tate Modern and the London Olympics, I hope to realise an art project for those who typically have no access to global events of this scale.

The viewer brings something individual to the experience of any artwork.

I want to expose and evaluate the fact that the seeing and sensing process is a system that should not be taken for granted as natural - it's a cultivated means of reality production that, as a system, can be negotiated and changed.

I am not opposed to the art market. I have lots of friends who are collectors. But the whole idea of the art market is complex. Sadly we have a situation where auction houses and secondary market dealers are creating a lot of confusion and unnecessary pollution.

In the past Berlin was much more radical and extreme and now it's becoming much more of a conventional European city.

Having an experience is taking part in the world. Taking part in the world is really about sharing responsibility.