https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13958338Edit ImageSaveSaveEditCropCustom TextPythagoras. Engraving attributed to H. David after C. Vignon.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 1071 x 1200 px | 300 dpiLarge JPEG 2521 x 2824 px | 300 dpiFree DownloadPythagoras. Engraving attributed to H. David after C. Vignon.More