Portrait of Wilhelm Conrad Röntgen.

Source: U.S National Library of Medicine Photographer unknown Kindly provided by National Library of Medicine

Hand with Rings: a print of one of the first of Wilhelm Röntgen's X-ray photographs. It shows the left hand of his wife, Anna Bertha Ludwig, and was presented to Professor Ludwig Zehnder of the Physik Institut, University of Freiburg, on 1 January 1896.

Source: National Aeronautics and Space Administration (NASA) Public domain via Wikimedia Commons Photographer: Wilhelm Röntgen

Wilhelm Röntgen's laboratory  at the University of Würzburg, where he made his discovery of x-rays.

Public domain via Wikimedia Commons Photographer unknown

Portrait of Wilhelm Conrad Röntgen.

Source: ETH-Bibliothek Zürich, Bildarchiv Public domain via Wikimedia Commons Photographer unknown

Wilhelm Conrad Röntgen. Lithograph.

Courtesy: Jacob van 't Hoff Collection, Ms. 74, Special Collections, The Sheridan Libraries, The Johns Hopkins University