Four years in the making with the help of 150 artists, in commemoration of WW1.

edition.cnn.com/style/article/pantheon-de-la-guerre-wwi-painting/index.html

A panoramic canvas measuring 402 feet (122 meters) around and 45 feet (13.7 meters) high. It contained over 5,000 life-size portraits of war heroes, royalty and government officials from the Allies of World War I.

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