Emperor Nikephoros I (r. 802–811) in the <i>Malasses Chronicle</i>, most likely an imaginary portrait.
Unknown Bulgarian artist
<a rel="nofollow" class="external text" href="https://www.alamy.com/invasion-of-bulgaria-by-the-emperor-nicephorus-i-in-811-and-his-capture-by-the-bulgarians-miniature-folio-145r-chronicle-of-constantine-manasses-1344-1345-vatican-apostolic-library-image211162085.html">Miniature, folio 145r, Chronicle of Constantine Manasses, 1344-1345. Vatican Apostolic Library.</a>