Vector drawing of Alexander Schmorell in profile, adapted after a photograph by Angelika Knoop-Probst (1918 - 1976), sister of Christoph Probst, taken near Marienau/Dahlem in the Luneburg Heide in 1939. By Angelika Knoop-Probst, Nicoasc (- Own work, CC BY 3.0, https://commons.wikimedia.org/w/index.php?curid=18328905