https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/14017353Edit ImageSaveSaveEditCropCustom TextChristianus de Helwich. Stipple engraving by F. G. Wolffgang after F. Jachmann.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 761 x 1200 px | 300 dpiLarge JPEG 2062 x 3252 px | 300 dpiFree DownloadChristianus de Helwich. Stipple engraving by F. G. Wolffgang after F. Jachmann.More