The historical boundaries data is taken from thehistorical boundaries projectwhich"aims at providing ready-to-use base maps for mapping historical data. It is work in progress: verify the maps by comparison to other sources before using in academic work. If you see errors, report them in the "issues" section."
The project websites also notes that its worth keeping in mind that:
boundaries are even more disputed than contemporary ones,
that the actual concept of territory and national boundary becomes meaningful, in Europe, only since the Peace of Westphalia (1648), that
areas of civilizations actually overlap, especially in ancient history, and that
overlaying these ancient vector maps on contemporary physical maps can be misleading; rivers, lakes, shorelines do change very much over millennia; think for instance about the evolution of the Aral Sea since the 1980s.
Click anywhere on the map to highlight the boundaries associated with your given location.
School Leadership 2.0 is the premier virtual learning community for school leaders from around the globe. Our community is a subscription based paid service ($19.95/year or only $1.99 per month for a trial membership) which will provide school leaders with outstanding resources. Learn more about membership to this service by clicking one our links below.