Portrait of <a href="https://en.wikipedia.org/wiki/Jan_de_Doot" class="extiw" title="w:Jan de Doot">Jan de Doot</a> and the kidney stone he removed with his own knife from his own kidney with the help of his brother in the 17th century. This story is described in the book <a href="https://en.wikipedia.org/wiki/Observationes_Medicae_(Tulp)" class="extiw" title="en:Observationes Medicae (Tulp)">Observationes Medicae</a> by <a href="https://en.wikipedia.org/wiki/Nicolaes_Tulp" class="extiw" title="w:Nicolaes Tulp">Nicolaes Tulp</a>.
<bdi><a href="https://en.wikipedia.org/wiki/en:Carel_van_Savoyen" class="extiw" title="w:en:Carel van Savoyen"><span title="Flemish painter (1619-1665)">Carel van Savoyen</span></a>
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<a rel="nofollow" class="external text" href="https://web.archive.org/web/20050309164120/http://www.luf.nl/downloadbestanden/leidraad1004.pdf">University of Leiden alumni magazine Nov 2004</a>