Coat of Arms or emblem of Tsar Ivan Shishman, tsar of   the Second Bulgarian Empire during 1371–1395. The image is based on the original miniature from the second half of the 14th century by an anonymous Arab traveller, now in the King's Archive of Morocco.
Self-made, based on file:Coat of Arms of the Bulgarian Empire.PNG and a historical image, published in "History of Bulgaria", volume 4 "The Bulgarian people under Ottoman rule (from XV to the beginning of the XVII century)", Publishing house of the Bulgarian Academy of Sciences, Sofia, 1983, page 58 (in Bulgarian).
Пакко