https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13991838Edit ImageSaveSaveEditCropCustom TextFriedrich Heinrich Alexander von Humboldt. Line engraving by A. Krausse, 1814.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 827 x 1200 px | 300 dpiLarge JPEG 1402 x 2034 px | 300 dpiFree DownloadFriedrich Heinrich Alexander von Humboldt. Line engraving by A. Krausse, 1814.More