In politics and economics, a Potemkin village is any construction (literal or figurative) built solely to deceive others into thinking that a situation is better than it really is.
Grigory Potemkin was a favorite lover of the Russian Empress Catherine II. After the Russian annexation of Crimea from the Ottoman Empire, ... Potemkin became governor of the region. The region had been devastated by the war; Potemkin's major tasks were to rebuild it and bring in Russian settlers. In 1787, as a new war was about to break out between Russia and the Ottoman Empire, Catherine II with her court and several ambassadors made an unprecedented six-month trip to New Russia. The purpose of this trip was to impress Russia's allies prior to the war. To help accomplish this, Potemkin set up "mobile villages" on the banks of the Dnieper River. 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.
https://en.wikipedia.org/wiki/Potemkin_village