From its lowest to its highest point, the majestic architecture of the Cathedral of St. Mary of the Flowers hides spectacular details.
The most interesting detail is the Gnomone, a hole in the lantern of the cathedral. This opening is far from insignificant, because it is by observing the sunrays shining on the Duomo’s floor that astronomers came to two important discoveries: the exact day of the solstice and the calculation of the Earth’s axial tilt, none other than two of the innovations that allowed the creation of our modern calendar.
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