"Potemkin Villages" are apocryphal, but: too good a metaphor not to keep to hand.
"As soon as the barge carrying the Empress and ambassadors arrived, Potemkin's men, dressed as peasants, would populate the village. Once the barge left, the village was disassembled, then rebuilt downstream overnight."
(aside: Imagine having a story like that completely overshadow your life's work? It's like finding out the Earl of Sandwich invented the appendectomy and nobody cares.)