Since my early childhood I have been fascinated by world exhibitions. At that time my parents told me about their visit to Expo '58 in Brussels and how my father tried to save the German pavilion from demolition, unfortunately without a positive result. So instead my parents bought parts of the exhibition's furniture designed by the German architect Egon Eiermann, furnishings I'm still living with, pieces of a very private Expo. Back then as a ten-year-old Boy I was deeply shocked to learn that buildings admired for their architectural Quality were demolished only aa short while after their construction. That's how I came to trace the ephemeral Expo phenomenon. 41 years have gone by, years in which a wide-ranging and voluminous arcive came into beeing, exhibitions were organized, books were written, TV reports and Radio programmes werde advised while journeys to Expo cities took place: Hanover (2000), Saragossa (2008), Shanghai (2010), Yeosu (2012), Milan (2015).