https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13998235Edit ImageSaveSaveEditCropCustom TextFriedrich Heinrich Alexander von Humboldt. Line engraving by J. Horsburgh after Baron C. von Steuben, 1815.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 738 x 1200 px | 300 dpiLarge JPEG 1131 x 1838 px | 300 dpiFree DownloadFriedrich Heinrich Alexander von Humboldt. Line engraving by J. Horsburgh after Baron C. von Steuben, 1815.More