A Comprehensive game !
Find out the longest lasting Empires during history of Civilization.
There should be all the Empires longest than 50 years, according to: http://en.wikipedia.org/wiki/List_of_longest-lasting_empires.
The dot is placed somewhere in the Empire, not always the political center, so that the dot are not too crowded.
There are approximately 90 dots and I am not gonna use a different map so that you can see where civilizations concentrated during history.