It is one page from Gold Codex of <a href="https://en.wikipedia.org/wiki/pl:Gniezno" class="extiw" title="w:pl:Gniezno">Gniezno</a>, artwork from end of 11th century written by gold.
Unknown author<span style="display: none;">Unknown author</span>
<ul><li>Date of creation: end of 11th century.</li>
<li>Date of taking photo: about 1988.</li>
<li>Date of scaning: unknown.</li></ul>
Codex form Chapter's Library in Gniezno, Ms. 1 a. (Codex aureus Gnesnensis).