https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13996377Edit ImageSaveSaveEditCropCustom TextAstronomy: Ptolemy and Johannes Regiomontanus, seated with an armillary sphere and the heavens above them. Process print, 1879, after a woodcut, 1543.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 803 x 1200 px | 300 dpiLarge JPEG 2088 x 3121 px | 300 dpiFree DownloadAstronomy: Ptolemy and Johannes Regiomontanus, seated with an armillary sphere and the heavens above them. Process print, 1879, after a woodcut, 1543.More