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Potemkin Village describes something that appears elaborate and impressive but in actual fact lacks substance.
ETYMOLOGY: After Grigori Aleksandrovich Potemkin [1739-1791], who had elaborate fake villages constructed for Catherine the Great's [1729-1796] tours of the Ukraine and the Crimea.
“the Potemkin village of this country's borrowed prosperity”
- Lewis H. Lapham [born 1935]