How Many Faces Did The Astrarium Of Giovanni Dondi Dell'orologio Have?

The Astrarium's design consisted of a complex system of dials and hands, which allowed it to display multiple astronomical and calendrical functions. According to historical records and existing literature, the Astrarium had seven faces, each with a distinct purpose:

The purpose of this report is to clarify the structural design of the famous Astrarium created by Giovanni Dondi dell’Orologio (c. 1330–1388). Based on historical analysis of Dondi’s surviving manuscript, Tractatus Astrarii , and subsequent reconstructions, it is concluded that the Astrarium featured (dials). While the mechanism contained additional internal wheels and a central movement, the user interface for reading astronomical data consisted of seven distinct epicyclic dials arranged within a rectangular frame. The Astrarium's design consisted of a complex system

Today, these replicas sit in museums like the Science Museum in London and the Smithsonian, allowing us to see exactly how those seven faces once calculated the heavens for the people of the Renaissance. and subsequent reconstructions