The "balcony of scientists", trompe l'oeil at ceiling of the Prunksaal, State Hall of the National Library, Vienna, Austria.
<bdi><a href="https://en.wikipedia.org/wiki/en:Daniel_Gran" class="extiw" title="w:en:Daniel Gran"><span title="Austrian painter (1694-1757)">Daniel Gran</span></a>
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2012-02-21
<span class="int-own-work" lang="en">Own work</span>