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http://www.charlesmillerltd.com/Catalogues/MS170708/lot%2073.jpg

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The Basilica of St. Mary of the Angels and the Martyrs in Rome:  At the beginning of the eighteenth century, Pope Clement XI commissioned the astronomer, mathematician, archaeologist, historian and philosopher Francesco Bianchini to build a meridian line, a sort of sundial, within the basilica. Completed in 1702, the object had a threefold purpose: the pope wanted to check the accuracy of the Gregorian reformation of the calendar, to produce a tool to predict Easter exactly, and…

The Basilica of St. Mary of the Angels and the Martyrs in Rome: At the beginning of the eighteenth century, Pope Clement XI commissioned the astronomer, mathematician, archaeologist, historian and philosopher Francesco Bianchini to build a meridian line, a sort of sundial, within the basilica. Completed in 1702, the object had a threefold purpose: the pope wanted to check the accuracy of the Gregorian reformation of the calendar, to produce a tool to predict Easter exactly, and…

Combination portable sundial and instrument for calibrating sundials  17th  century,from France,brass,silver

Combination portable sundial and instrument for calibrating sundials 17th century,from France,brass,silver

1789 Antique ASTRONOMICAL RING print.

1789 Antique ASTRONOMICAL RING print. Astronomical Rings. Gemma rings. Astronomical Instrument. Astronomy. Celestial. 225 years old

A VERY RARE FRENCH IVORY AND SILVER CRUCIFIX DIAL, POSSIBLY DIEPPE, CIRCA 1600 the outer surfaces incised with depictions of the crucifixion, and Mary holding the Christ Child flanked by cherubs, the sides divided for ante and post meridian hours, the inside containing a 7mm. glazed painted compass with needle, gilt painted latitude list on blue ground, engraved silver hinge at base with silver latitude scale and support, six reliquary compartments behind, the cross arms decorated with…

A VERY RARE FRENCH IVORY AND SILVER CRUCIFIX DIAL, POSSIBLY DIEPPE, CIRCA 1600 the outer surfaces incised with depictions of the crucifixion, and Mary holding the Christ Child flanked by cherubs, the sides divided for ante and post meridian hours, the inside containing a 7mm. glazed painted compass with needle, gilt painted latitude list on blue ground, engraved silver hinge at base with silver latitude scale and support, six reliquary compartments behind, the cross arms decorated with…

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