<bdi><a href="https://en.wikipedia.org/wiki/en:Adrian_Zingg" class="extiw" title="w:en:Adrian Zingg"><span title="Swiss painter (1734-1816)">Adrian Zingg</span></a>
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1. <a rel="nofollow" class="external text" href="https://purl.org/nga/collection/artobject/139277">purl.org</a><br>2. <a rel="nofollow" class="external text" href="https://www.nga.gov/collection/art-object-page.139277.html">National Gallery of Art, Washington, D. C., online collection</a>