Since it was part of a World's Fair, it is unsurprising today that the Eiffel Tower was slated for demolition. I grew up very near to Balboa Park, and it was rather late in life that I learned that all those buildings were sort of hastily erected for the Panama–California Exposition, 110 years ago, and they were expected to be demolished quickly, or decay, because they were never intended for permanent habitation. And so the intervening years have been a saga of very industrious preservation and restoration, as most all of the buildings have been deemed to be architectural marvels and very much worth keeping around.