https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13979129Edit ImageSaveSaveEditCropCustom TextFriedrich Heinrich Alexander von Humboldt. Stipple engraving by J. Rossmaesler, senior.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 613 x 1200 px | 300 dpiLarge JPEG 1075 x 2106 px | 300 dpiFree DownloadFriedrich Heinrich Alexander von Humboldt. Stipple engraving by J. Rossmaesler, senior.More