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A historical route indicating 123 historical points in Paris. On the disk appears a Phrygian cap, a hat that symbolizes freedom and liberty, and symbolizes the French revolution by being the hat of the Jacobin club. The disks are accompanied by an application describing the places
The current disk is located near the Bastille square, and near it are many disks that possibly describe the outline of the Bastille, as you can see in the following picture Click for a larger image
Translation of the text on the sign: REVOLUTION COURSE