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Girolamo della Volpaia, Armillary sphere

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Girolamo della Volpaia (ca. 1530-1614)
Armillary sphere, 1564
Florence, Istituto e Museo di Storia della Scienza, inv. 2711

This armillary sphere was basically designed for teaching purposes. It was used to illustrate the main celestial circumferences with reference to the horizon at the observer's location.