Built in 1410 by clockmaker Mikuláš of Kadaň and astronomer Jan Šindel, the Orloj represents the Hermetic universe in perpetual motion:
The Astrolabe Ring. Tracks planetary hours, sidereal time, and Old Bohemian hours.
The Zodiacal Ecliptic. A gold sun hand moves around an eccentric inner zodiac ring to show the sun's position in the celestial houses.
The Four Moving Allegories. Death ringing his bell, Vanity admiring his mirror, the Miser clutching his purse, and the Turk shaking his head — the four fates flanking the dial, set in motion each hour.
Each carries its full hermetic decipherment and an observational protocol — where to stand, when, and what to watch for — in the Prague field codex.
Or read the complete Florence codex free first.