Internationale vlaggenparade voor stadhuis Middelburg ter ere van de boomplantdag (1947) by Particam https://www.rawpixel.com/image/13752727/photo-image-face-person-skyFree Image from public domain licenseParade in Berlijn (c. 1939 - c. 1940) by Associated Press and Recla Internationale Persfoto Centrale https://www.rawpixel.com/image/13757460/photo-image-person-clothing-roadFree Image from public domain license