Pythagoras. Engraving attributed to H. David after C. Vignon. https://www.rawpixel.com/image/13958338/pythagoras-engraving-attributed-david-after-vignonFree Image from public domain licenseMathematicians and astronomers: twenty portraits. Engraving by J.W. Cook, 1825. https://www.rawpixel.com/image/13989355/mathematicians-and-astronomers-twenty-portraits-engraving-jw-cook-1825Free Image from public domain licenseThe school of Athens: a gathering of Greek philosophers disputing with Saint Paul the Apostle. Engraving by G. Ghisi, 1550… https://www.rawpixel.com/image/13979107/image-cartoon-person-artFree Image from public domain licenseThe school of Athens: a gathering of ancient philosophers. Engraving by G. Volpato after G. Cades after Raphael. https://www.rawpixel.com/image/13998076/image-person-church-artFree Image from public domain licenseThe school of Athens: a gathering of ancient philosophers. Engraving by G. Mochetti after Raphael. https://www.rawpixel.com/image/13971174/image-person-church-artFree Image from public domain licenseThe School of Athens: a key to the figures in the centre of the composition. Engraving by G. Volpato, after Raphael. https://www.rawpixel.com/image/13989676/image-paper-cartoon-faceFree Image from public domain licenseThree men read while a woman writes numerals; representing arithmetic. Engraving by C. Cort, 1565, after F. Floris, c. 1557. https://www.rawpixel.com/image/14017277/image-cartoon-face-personFree Image from public domain licenseThe school of Athens: a gathering of ancient philosophers. Engraving by J. & T. Bartlett, 1835, after Raphael. https://www.rawpixel.com/image/13989200/image-person-church-artFree Image from public domain licensePythagoras. Line engraving by B. Bartoccini after C. C. Perkins. https://www.rawpixel.com/image/13989241/pythagoras-line-engraving-bartoccini-after-perkinsFree Image from public domain licenseTablet ("Tabula Iliaca") Inscribed with a Historical Text https://www.rawpixel.com/image/14270652/tablet-tabula-iliaca-inscribed-with-historical-textFree Image from public domain licensePythagoras. Line engraving by D. Cunego, 1782, after R. Mengs after Raphael. https://www.rawpixel.com/image/14003972/pythagoras-line-engraving-cunego-1782-after-mengs-after-raphaelFree Image from public domain licenseMathematicians: Ptolemy, Pythagoras, Euclid, Nicomachus, Aristoxenus and Iamblichus. Engraving after J. van Steegeren, 1667… https://www.rawpixel.com/image/13982010/image-cartoon-face-personFree Image from public domain license