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Cassini's Sun calendar in the Basilica of San Petronio

Cassini's Sun calendar in the Basilica of San Petronio


Copyright: Calter Photo

In this Sun calendar, a hole in the ceiling of the cathedral projects a shaft of sunlight onto this bronze strip on the pavement below which is engraved with the days of the year and signs of the zodiac.

The Basilica of San Petronio is in Bologna, Italy.

Last Update: 1 September 2019
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2-May-2024 10:18 UT

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