Unless specified otherwise, all content in the World Historical Gazetteer is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) License. Externally hosted contributor content that is linked to by the World-Historical Gazetteer is governed by the copyrights and licenses of the contributor.
Source code created for the World Historical Gazetteer is released under the GNU General Public License v3.0. World Historical Gazetteer also uses software packages which are released under various open source licenses. Consult the individual packages for details.