One of the real challenges, since we're working in so many places - Mexico, Japan, Brazil - is understanding variations, both in terms of culture and context.

The world has changed a great deal from when I began 50 years ago. I was very fortunate. There were a lot of opportunities that perhaps don't exist today.

We learn a lot, and each museum ends up having its own distinctive character and personality.

I was in Taiwan recently and was completely amazed by the density of population. It makes New York look like no one is out on the streets.

The responsibility of an architect is to create a sense of order, a sense of place, a sense of relationship.

Ultimately it's the public nature of those projects that I most enjoy. Museums are more than just places to view art, they're also civic and social centers.

Rome has not seen a modern building in more than half a century. It is a city frozen in time.