Control is the wrong word. The practice is very much about sharing, and, in any creative practice, some individuals, whether partners or directors, are much closer to certain projects than I could ever be.

I think you never stop learning.

Since Stonehenge, architects have always been at the cutting edge of technology. And you cant separate technology from the humanistic and spiritual content of a building.

I tend to move between turtlenecks and shirts and ties. I don't really have a uniform in the sense that some people might.

Manhattan, one of the most moneyed spots on the planet, also has one of the greatest concentrations of people in its skyscrapers. Its also, of course, the place where every architect wants to build his tower.

Every time I've flown an aircraft, or visited a steelworks, or watched a panel-beater at work, I've learned something new that can be applied to buildings.

There's a snobbery at work in architecture. The subject is too often treated as a fine art, delicately wrapped in mumbo-jumbo. In reality, it's an all-embracing discipline taking in science, art, maths, engineering, climate, nature, politics, economics.