Ancient peloponnese
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CC BY-SA 3.0
<p><a rel="nofollow" class="external free" href="http://sharemap.org/public/Ancient_peloponnese">http://sharemap.org/public/Ancient_peloponnese</a>
Geospatial data sources: 
</p>
<ul><li>Open Street Map Data (CC-SA-BY) - <a rel="nofollow" class="external free" href="https://wiki.openstreetmap.org/wiki/OpenStreetMap_License">http://wiki.openstreetmap.org/wiki/OpenStreetMap_License</a></li>
<li>Natural Earth - <a rel="nofollow" class="external free" href="http://www.naturalearthdata.com/">http://www.naturalearthdata.com/</a> (public domain)</li></ul>