Nino doesn't understand why ariane wastes time building a house of cards: it's so ephemeral! but his big sister explains that sometimes eternal legends are born from dreams of the ephemeral. for example, the eiffel tower, intended as a technical feat to create the event during the universal exhibition in paris in 1889... planned to be dismantled afterwards, it will nevertheless become part of the parisian landscape and imagination forever. you thought you knew everything about the eiffel tower? the 30e fil de l'histoire album told by ariane and nino will make you see this unique monument in a whole new light! as always, with lots of humour and unexpected information for young and old! a monument of pedagogy to discover a world-famous monument!