This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Exposition du Matriel didactique. fr Exposition du Matriel didactique organise par Paul Otlet juillet durant l'Exposition Internationale de Bruxelles Mundaneum Mundaneum other versions Custom marker PDoldauto Mundaneum Paul Otlet Palais Mondial Uploaded with Restauration
Page 2023 Free-images.com. All images are Public Domain