The “Canale dei Francesi” (Frenchmen's Canal) links the Old to the New Harbor. On a pier, used by fishermen, we can find a compass rose, perfectly aligned with the geographic north.
I saw this mark inside the “Porto Mediceo”: it says “caposaldo di livellazione” (geodetic control mark) of the “Rete Mareografica Nazionale” (National Tide Gauge Network).See also: Torre del Marzocco - Tower of the Winds - Strange Clock
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