File:Konstantin Asen-coin-coopery 3.jpg

Summary
Билонова монета- Константин Асен на трон. Източник: "История на България.Том ІІІ - Втора българска държава" - Издателство на БАН, 1982 г.

Fair use rationale for use in Medieval Bulgarian coinage
Use of this copyrighted image in article Medieval Bulgarian coinage is believed to be fair use on the grounds that:
 * No equivalent image is available in the public domain or could be created that would adequately give the same information
 * It is used here strictly for educational purposes
 * Use of the image will not significantly detract from the copyright holder's ability to sell the image
 * Use of the image adds significantly to the article as it directly illustrates the subject of the article
 * The image is a small portion of the original work
 * It is a low resolution image in .jpg format
 * It is freely available on the internet