According to Latvian artist Kriss Salmanis inhabitants of European nations that were once under the influence of the Soviet Union can be easily recognised from other Europeans.
Ask people whether they know Mendelejev's dream. Those who stare at you with a blank look are West-Europeans and those who confirm the story of how Dmitri Mendelejev came up with the periodic table are former Soviets (or were under the communist influence until the wall came down. Let's keep it political correct).
There it is, that’s how simple life can be.