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Photo: Corradox, CC BY-SA 3.0 via Wikimedia Commons
It was put up to honour the "borderless" Europe that originated here.
© OpenStreetMap contributors
This museum was opened in 2010, 25 years after the signing of the Schengen Treaty, in the "Centre Européen" building.
Dating from 1390 but almost completely rebuilt in the 19th century, it is now a hotel and conference centre.