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| title | chunk | source | category | tags | date_saved | instance |
|---|---|---|---|---|---|---|
| Christian Boyling | 1/1 | https://en.wikipedia.org/wiki/Christian_Boyling | reference | science, encyclopedia | 2026-05-05T09:35:48.883715+00:00 | kb-cron |
Christian Boyling (flourished in 1669) was a scientific instrument maker. All that is known for certain about this craftsman is that he was serving as "Mechanic" to the Duke of Saxony in 1669. He designed and built a perpetual calendar held by the Museo Galileo in Florence, consisting of two overlapping brass plates sandwiching a revolving disk containing twelve enameled disks representing the months (eleven are extant) which show through a window on the front plate. The finely perforated front plate is decorated with the arms of the House of Saxony. At its center is a circle showing the hours and containing three-time disks: a moon phase night clock, a perpetual calendar, and a zodiacal calendar showing lengths of the diurnal cycle over the year.
== See also == Duke of Saxony
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