The Flatiron Building -- The Empire State Building -- Villa Savoye -- Fallingwater -- Architect in focus : Frank Lloyd Wright -- From concept to icon : The Pentagon -- The Vanna Venturi House -- The Vehicle Assembly Building (VAB) at the Kennedy Space Center -- From concept to icon : Sydney Opera House -- The Willis Tower -- The Lloyds Building -- Architect in focus : Richard Rogers -- The Petronas Towers -- The Guggenheim Museum, Bilbao -- Khan Shatyr -- Burj Khalifa -- The Shard -- Conclusion -- Timeline -- Glossary -- Find out more.