Keywords: Second Bulgarian Empire.svg The Second Bulgarian Empire under Ivan Asen 1218-41 Image source http //lcweb2 loc gov/frd/cs/bgtoc html Based on information from Christ Atanasoff The Bulgarians Hicksville New York 1977 37; and Hermann Kinder and Werner Hilgemann The Anchor Atlas of World History 1 Garden City New York 1974 204 Original work of US government for Library of Congress Country Studies PD-USGov Maps of the history of Bulgaria in the Middle Ages Maps of the history of Romania in the Middle Ages LOC Wikiproject Romania in the 13th century |