https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13992145Edit ImageSaveSaveEditCropCustom TextAn old man discourses with a woman with a bird on her head; representing dialectic. Engraving by C. Cort, 1565, after F. Floris, c. 1557.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 1200 x 970 px | 300 dpiLarge JPEG 3106 x 2511 px | 300 dpiFree DownloadAn old man discourses with a woman with a bird on her head; representing dialectic. Engraving by C. Cort, 1565, after F. Floris, c. 1557.More