Man touching crude oil in San Juan River, 10/1972. Original public domain image from Flickr https://www.rawpixel.com/image/8799462/photo-image-hand-public-domain-personFree Image from public domain licenseLönnrot ja runonlaulajat, luonnos helsingin yliopiston juhlasalin seinämaalaukseksi, 1912, by Akseli Gallen-Kallela https://www.rawpixel.com/image/8863452/image-art-public-domain-personFree Image from public domain licenseTetradrachm (Coin) Portraying King Ptolemy II Philadelphos and Queen Arsinoe II by Ancient Greek https://www.rawpixel.com/image/8958083/photo-image-crown-person-circleFree Image from public domain licenseCabin interior from the poem the cloud's brother, 1897 - 1900, by Albert Edelfelt https://www.rawpixel.com/image/8863715/image-clouds-art-public-domainFree Image from public domain licenseOktodrachm with Busts of Ptolemy I and Berenike I (246–221 BC) metalwork design in high resolution by anonymous. https://www.rawpixel.com/image/7728704/photo-image-art-public-domain-artworksFree Image from public domain licenseThe decapitation of st. john the baptist, russian icon, 1500 - 1599, Tekijä Ei Tiedossa https://www.rawpixel.com/image/8865227/image-art-public-domain-iconFree Image from public domain licensePentadrachm (Coin) Portraying King Ptolemy I Soter by Ancient Greek https://www.rawpixel.com/image/9021531/pentadrachm-coin-portraying-king-ptolemy-soter-ancient-greekFree Image from public domain licenseAntoninianus (Coin) Portraying Emperor Diocletian by Ancient Roman https://www.rawpixel.com/image/8961243/antoninianus-coin-portraying-emperor-diocletian-ancient-romanFree Image from public domain licensetwo round silver wires enclosing square silver wire; set with six elliptical turquoises( 1 stone missing, others worn).… https://www.rawpixel.com/image/7654569/photo-image-vintage-art-public-domainFree Image from public domain licenseGallerie des Modes et Costumes Français, 1785, aaa. 285: La belle et élegante Suzann (...) (1785) by Pierre Charles Baquoy… https://www.rawpixel.com/image/13771589/image-paper-border-cartoonFree Image from public domain license