What Was The Number Of Faces On Giovanni Dondi Dell'orologio's Astrarium? !!exclusive!! May 2026

Modern reconstructions (e.g., by the Museo della Scienza in Florence or by clockmaker Francis Maddison) have confirmed the 107 faces count from the diagrams. However, some modern replicas simplify the mechanism, reducing the number of functional hands to about 20–30 for practicality. If you are writing a historical or technical paper: The Astrarium had 107 faces (i.e., separate moving pointers).

It had 7 main dials , but those dials contained a total of 107 individual hands and indicators to track the complex motions of the Moon, Mercury, Venus, Mars, Jupiter, and Saturn according to Ptolemaic astronomy. Modern reconstructions (e

This is a fascinating question because it touches on the intersection of history, engineering, and classical astronomy. The short answer is that Giovanni Dondi dell’Orologio’s . It had 7 main dials , but those