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Girolamo della Volpaia, Sfera armillare
Girolamo della Volpaia, Armillary sphere

Florence 1564

Brass, crystal; sphere diameter sfera 33 cm; height 77,5 cm, width 49 cm
Florence, Istituto e Museo di Storia della Scienza, inv. 2711

Sphere showing to the Ptolemaic system. At the center is a large crystal globe representing the Earth and 8 brass rings portraying the celestial coordinates.