Postage block (miniature sheet) of Czechoslovakia dedicated to 30th anniversary of the first postage stamp of Czechoslovakia, Hradčany of Prague, 1948, Scott#368
<bdi><a href="https://en.wikipedia.org/wiki/en:Alphonse_Mucha" class="extiw" title="w:en:Alphonse Mucha"><span title="Czechoslovak photographer, painter and illustrator (1860-1939)">Alphonse Mucha</span></a>
</bdi>
own collection