And of course I like Berlin a lot. It's such an interesting city

Our lives are complex; our emotions are complex; our intellectual desires are complex. I believe that architecture … needs to mirror that complexity in every single space that we have, in every intimacy that we possess.

Cities are the greatest creations of humanity.

Architecture is not based on concrete and steel, and the elements of the soil. It's based on wonder.

It's about how to bring together the seemingly contradictory aspects of the memorial, which is about a tragedy and how it changed the world, but also about creating a vital and beautiful city of the 21st century.

There will be a competition for the memorial. And then it can be developed with trees, with planting. It can become a very beautiful place protected from the streets, because it is below. And it can be something very moving and very private.

I think to be creative you have to resist taking the easy path.