The Montreal Tower was a project commissioned by Taylor Woodrow and executed at the Euston office. It was presented to the authorities of the (then) forthcoming Montreal Expo as a "central feature". It had to incorporate a central concrete tower and provide a wide variety of public entertainment functions. This brief was extended to form a "skin and guts" proposition: a vertical tree with enormous roots on to which could be hung temporary exhibition elements that would be removed and replaced after the Expo.

Every level revolves, the bubbles which make up the tower shine and are constantly different.... the completely chameleonic building.

Archigram, Edited by Peter Cook, Warren Chalk, Dennis Crompton, David Greene, Ron Herron & Mike Webb, 1972
[reprinted New York: Princeton Architectural Press, 1999]