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Giovanni de' Dondi, Astrarium


Giovanni de' Dondi (ca. 1330-1388)
Astrarium, 14th century
Padua, Biblioteca Capitolare, Ms. D.39, ff. 12v-13r

This manuscript contains an extremely detailed plan, including technical drawings, of the oldest planetarium driven by clockwork. On ff. 12v-13r, the drive wheel of the epicycle and instrument of the planet Venus