The sundial in the Cremona Campus of the Politecnico di Milano
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A sundial was created to embellish the external wall of the main hall of the Cremona Campus of the Politecnico di Milano, a reminder of the way the measurement of time was carried out in distant times. The tool is certainly stimulating for students, since the time indicated is the true solar one for the place. By applying the notions of time zone, longitude, mean time and equation of time, it is possible to derive the time as given by our modern clocks.