Portrait of Karl Ernst Osthaus (1874—1921), a notable patron of the European avant-garde.
<bdi><a href="https://en.wikipedia.org/wiki/en:Ida_Gerhardi" class="extiw" title="w:en:Ida Gerhardi"><span title="German painter (1862-1927)">Ida Gerhardi</span></a>
</bdi>
1903
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