Catalogue of the E. L. Kirchner exhibition, Galerie Schames, Frankfurt by Ernst Ludwig Kirchner https://www.rawpixel.com/image/12038152/image-paper-person-bookFree Image from public domain licenseChurchyard and Church, Fortress at Fehmarn (Kirchhof und Kirche, Burg auf Fehmarn) by Ernst Ludwig Kirchner https://www.rawpixel.com/image/12038564/image-person-art-cartoonFree Image from public domain licenseProspectus for The work of Ernst Ludwig Kirchner by W. Grohmann by Ernst Ludwig Kirchner https://www.rawpixel.com/image/12018103/image-face-paper-personFree Image from public domain license