File:Bulgarian Empire (893-927).svg

Source: http://commons.wikimedia.org/wiki/File:Bulgaria_Simeon_I_%28893-927%29.svg

Note: this map uses an SVG map of Europe by User:Tintazul and User:ZorroIII, which is under the CC-BY-SA-2.5 license, for the small location map of Europe in the bottom left corner.