https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/14018596Edit ImageSaveSaveEditCropCustom TextM0005140: Portrait of Karl Koller (1857-1944)Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 826 x 1200 px | 300 dpiLarge JPEG 1212 x 1761 px | 300 dpiFree DownloadM0005140: Portrait of Karl Koller (1857-1944)More