Yes there have to be amazing graphicians who think out these logos to the big events.

For example if someone remembers the logo of the 2014 Winter Olympics

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Sochi.xar

That was so cleverly designed by assuming russian graphicians - playing with the name of the city Sochi and the 2014 in a robust font, also associating maybe to the robust Russia so to the country, plus 'hi' and '14' were mirrored so referring to the ice, to the winter, moreover also the 'so' with '14'. I do not have that version but it was so brilliant that they did the same in cyrillic writing. So in a simple logo they put everything and applied the same logic to two different writing systems. Plus in one putting the domain so where to find on the internet, the olympic circles of course and the .ru extension straightly in which country the event is.

Sorry for going slightly off, but they really deserve to be mentioned and appreciated