When the Post Office Tower was opened officially on 8 October 1965, it was London's tallest building. It was also seen as symbolising a new, exciting technological revolution and a new spirit of optimism, successfully capturing the public imagination. In this talk, Mark Dunton draws on the public records held by The National Archives to explore aspects of the Tower's history, design and construction and its wider significance.Mark Dunton is principal records specialist in contemporary history. His research interests include post-1945 British political, social and economic history and the policies of the Heath government in the early 1970s.