Known as Europe's tax heaven, each and every individual citizen of Monaco enjoys a tax-free lifestyle since the 1870s. For decades, Monaco lived off solely on its casinos. At present, Monaco's current efforts to diversify its economy have made tourism its number one source of income and casino profits only at five percents. Fun fact: Citizens of Monaco are not allowed to gamble, nor even visit the casinos.
Many thanks to Rafal for sending me a card from his trip to Monaco! :)