Seal of Grand Duke <a href="https://en.wikipedia.org/wiki/Vytautas" class="extiw" title="w:Vytautas">Vytautas the Great</a> with the coat of arms of the <a href="https://en.wikipedia.org/wiki/Grand_Duchy_of_Lithuania" class="extiw" title="w:Grand Duchy of Lithuania">Grand Duchy of Lithuania</a>.
Kajetan Wincenty Kielisiński
Biblioteka Jagiellońska. BJ Graf. I. 8592.