The demolition of the Doric portico at Euston Station, London, 1961.

UNITED KINGDOM - MARCH 13: Euston was the first railway terminal in any capital city in the world and the Doric arch at the entrance to the station, designed by Philip Hardwick, was suitably imposing. The campaign against its destruction became something of a cause celebre and many protesters argued that it should have been dismantled and re-erected on another site. The loss of the portico was a major influence in changing attitudes to the preservation of Britain's architectural heritage. (Photo by SSPL/Getty Images)