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Your voice will rise above the din of the crowd thanks to the secret covert medieval communication system.
In Milan's Palazzo della Ragione, the Loggia dei Mercanti conceals a secret communication system. Your whispers will reach a well-placed listener on the opposite side of the portico if you speak softly to some of its columns. An unusual acoustic phenomenon occurs beneath perfectly domed buildings and archways around the world. The loggia is part of a medieval merchants' square.
