<p><i>Städelsches Kunstinstitut</i> ("<a href="https://de.wikipedia.org/wiki/St%C3%A4del" class="extiw" title="de:Städel">Städel</a>), <a href="//commons.wikimedia.org/wiki/Frankfurt_am_Main" title="Frankfurt am Main">Frankfurt am Main</a>.
</p>
Photography: <a href="//commons.wikimedia.org/wiki/User:Fb78" title="User:Fb78">F. Bucher</a>
No machine-readable author provided. <a href="//commons.wikimedia.org/wiki/User:Fb78" title="User:Fb78">Fb78</a> assumed (based on copyright claims).
CC BY 2.5
No machine-readable source provided. Own work assumed (based on copyright claims).