<bdi><a href="https://en.wikipedia.org/wiki/en:Anton_Altmann" class="extiw" title="w:en:Anton Altmann"><span title="Austrian painter (1808-1871)">Anton Altmann</span></a>
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<a rel="nofollow" class="external text" href="https://www.lempertz.com/de/kataloge/lot/1029-3/1532-anton-altmann-d-j.html">Kunsthaus Lempertz, 17.05.2014, lot 1532</a>