Medical professors at the University of Vienna. Lithograph by J. Stadler, 1855, after A. Prinzhofer, 1853. https://www.rawpixel.com/image/13995981/image-rosas-face-personFree Image from public domain licenseMusic Sound Frequency Classic Microphone Concept https://www.rawpixel.com/image/742331/free-image-rawpixelView licensePhoto Frame Gallery Border Decoration Concept https://www.rawpixel.com/image/738894/free-image-rawpixelView licenseFilmstrip Roll Photograph Cinematography Tape Concept https://www.rawpixel.com/image/739006/free-image-rawpixelView license