Thalian peili, kansallisteaterin kattomaalauksen luonnos, yksityiskohta, 1932, Yrjö Ollila https://www.rawpixel.com/image/8863442/image-art-public-domain-maskFree Image from public domain licenseThalian peili, kokonaisluonnos kansallisteatterin kattomaalausta varten, 1932, Yrjö Ollila https://www.rawpixel.com/image/8863183/image-art-public-domain-paintingFree Image from public domain licenseDancing girls and a violin player, detail sketch for the national theatre ceiling, 1932, Yrjö Ollila https://www.rawpixel.com/image/8861236/image-art-public-domain-personFree Image from public domain license