https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/14018124Edit ImageSaveSaveEditCropCustom TextFriedrich Heinrich Alexander von Humboldt. Line engraving by A. Krausse.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 853 x 1200 px | 300 dpiLarge JPEG 1486 x 2090 px | 300 dpiFree DownloadFriedrich Heinrich Alexander von Humboldt. Line engraving by A. Krausse.More