Meridians and Noon Lines

Astronomers have used large buildings such as churches to chart the position of sun at noon.

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Watch the sun trace out the daily motion and analemma in the sky

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Watch the sun cross the meridian.at St. Maria Degli Angeli, finished in 1846.

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In Mexico Ruben Nohitol has a vertical sundial calibrated for the Equinox.

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Watch a time lapse video of the sun passing across the floor of Cathedral di Bari