Frank Gehry

So it all was one material.

And the choices then were copper.

And then you have stainless steel.

And you're pretty much limited to a palette like that.

Now, copper, when you put it on a building, turns very dark for about 10 years and it's kind of morose.

So it's, unless you pre-green it, and when you pre-green it, it looks kind of phony to me.

So I reject that.

And I started using stainless steel.

And when you go to Bilbao and you use stainless steel, Bilbao is a city that has a lot of rain.

And a lot of gray skies and stainless steel in gray skies goes dead.

You'll see that the stainless steel in Millennium Park will go quiet when it's cloudy.

It won't shine.

Yeah, it reflects the sky.

And if the sky is gray, it reflects the gray sky and it goes gray.

In Bilbao, that would have been difficult.

And I found titanium by accident that in a gray sky, it turns golden and shines.

And so I used it in Bilbao.

It's very expensive.

The reason I didn't use it here, it would have increased the budget by a lot of money.

And since these shapes were not... It wasn't one whole building.