“Gerbertus, a finibus suis expulsus, Ottonem petiit imperatorem, et cum eo diu conversatus, in Magdaburg horologium fecit, illud recte constituens, considerata per fistulam quadam stella nautarum duce.” 1065
— from A History of Inventions, Discoveries, and Origins, Volume 1 (of 2) by Johann Beckmann
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