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![The components of an astrolabe (a medieval instrument, now replaced by the sextant, that was once used to determine the altitude of the sun or other celestial bodies); signed "HOC FACET [SIC] VIVES" an inscribed "DON. COLVBINUS. DE. ALFIANO. MONACUS. VALLIS. VMBROSE. VTEBATUR. MD.LXXII" meaning Don Columbino de Alfiano, Monk of Vallombrosa [in Tuscany, where there was a famous monastry] used [this], 1572.](https://iiif.wellcomecollection.org/image/M0017322/full/600%2C/0/default.jpg)