Medieval chart of the decemnovenale cycle

Bildnummer 11691899
Medieval chart of the decemnovenale cycle
Medieval chart of the decemnovenale cycle. 1230 extract from De sphaera mundi,by the Parisian astronomer and monk Johannes de Sacrobosco (circa 1195-1256),with a chart showing the decemnovenale cycle,the cycle of epacts,and the cycle of the 'claves.' De sphaera mundi is a short astronomy textbook that was widely read and influential in Europe as an introduction to astronomy. Sacrobosco is also known for writing a short introduction to the Hindu-Arabic numeral system,which became the most widely read introduction to the subject in the later mediaeval centuries. He also correctly described the defects of the then-used Julian calendar and recommended what was essentially the Gregorian calendar
Lizenzart: Lizenzpflichtig
Credit: Science Photo Library / NEW YORK PUBLIC LIBRARY / Renaissance and medieval manuscripts collection
Bildgröße: 2729 px × 3850 px
Modell-Rechte: nicht erforderlich
Eigentums-Rechte: nicht erforderlich
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