In everyday language mega events are gatherings that may be of various kinds (religious, sports, cultural, etc.) which become events when, from a temporal point of view, they occur at short or long, regular intervals and from the point of view of size attract (or should attract) a vast audience, both real and virtual. Although this definition requires greater precision for it to become an analytical category, it already contains some important elements that cover both qualitative and quantitative aspects. A more robust definition of a mega event has to take into consideration, firstly the importance of the planning of the grand event. The project must set out right from the very initial stages of planning (ex ante) to create an extraordinary event. Its realization will confirm (ex post) only the strength (or the weakness) of its conception and management. Some events have become great by chance, but this is the exception that confirms the rule. And secondly, it has to take into conside