https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13986401Edit ImageSaveSaveEditCropCustom TextCarl Koller. Photograph, 1909.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 799 x 1200 px | 300 dpiLarge JPEG 2173 x 3262 px | 300 dpiFree DownloadCarl Koller. Photograph, 1909.More