Norman Foster

I think you never stop learning.

Joseph Bazalgette created a sewer system which he originally sized for London's needs of the time - he then doubled it to anticipate the future beyond. These are the qualities that I admire.

I hope that any expansion of London will learn from the planning examples of some of its most desirable areas such as Chelsea, Notting Hill, Belgravia and Mayfair. All are characterised by high density and a generosity of green spaces.

I hope that any expansion of London will learn from the planning examples of some of its most desirable areas such as Chelsea, Notting Hill, Belgravia and Mayfair. All are characterised by high density and a generosity of green spaces. They are all pedestrian-friendly with shops, entertainment, restaurants and pubs within easy walking distance.

I think cars encapsulate the history of innovation and style - it's the other side of the coin of the car being public enemy No.1.

You cannot separate the buildings out from the infrastructure of cites and the mobility of transit.

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

I was born in 1935, and as far back as I can remember, I was sketching designs. My first subject was an aircraft, which I imagined myself piloting.

There are those airports which make you feel better, and there are those airports that, when you go there, your heart sinks: you can't wait to get out of there. They both function as airports, but it's the things that you can't measure that make them different.

I love flying; I love aircraft, and you could say I've had a love affair with flight since I was a child. I travel a huge amount. I use airports, and as a pilot, I've flown in and out of airports thousands of times, so really, I have a fairly broad perspective.

As an architect, you design for the present, with an awareness of the past, for a future which is essentially unknown.

We now think it hilarious that medieval streets were used as open sewers. Equally, our descendants will say: 'You won't believe this, but people were once allowed to hurl a couple of tons of dangerous metal around smashing into each other.'