A map map of the First Bulgarian Empire within Europe circa 814 CE.
This file was derived from: Blank map of Europe.svg: Data sources:

Main data: http://www.lib.utexas.edu/maps/historical/shepherd/byzantine_empires_814.jpg (A lower quality version is available on commons: Europe around 800.gif)
Bulgarian Empire: Territorial expansion during the reign of Khan Krum (803-814).png
Blank map of Europe.svg: maix¿?derivative work: Alphathon