One of the ways to get something architecturally novel built is to tell people it is temporary. Despite the fact that 99.9% of buildings are temporary over a few generations, people seem to tolerate something as long as it will be gone before they are. As a result, several of the worlds most famous pieces of architecture (Barcelona and Rietveld pavilions) or some of the worlds most famous city landmarks (Eiffel Tower, London Eye) have remained because they won people over after the fact.