Mike Ogden - 'History of Skyscrapers' or ‘The Sky’s the Limit’ - Born in the 19th century, the skyscraper came to symbolise the 20th, and now ever-taller, in the 21st. There are nearly 5,000 skyscrapers around the world, that’s now anything over 40 storeys. Join Mike for an entertaining tour through skyscraper history. From the time when seven storeys high was an object of wonder, he'll look at the canyon cities of 20th century America, and venture around the world to see the tall towers that are now proliferating. From Nelson Mandela House in Peckham to the Towering Inferno in San Francisco, and from King Kong climbing the Empire State Building to Philippe Petit's tightrope walk between the twin towers of the World Trade Center.