Ptolemy

Born 100 AD

Claudius Ptolemy was a mathematician, astronomer, geographer, astrologer and music theorist, who wrote about a dozen scientific treatises, three of which were of importance to later Byzantine, Islamic, and Western European science. The first is the astronomical treatise now known as the Almagest, although it was originally entitled the Mathēmatikē Syntaxis or Mathematical Treatise, and later known as The Greatest Treatise. The second is the Geography, which is a thorough discussion on maps and the geographic knowledge of the Greco-Roman world. The third is the astrological treatise in which he attempted to adapt horoscopic astrology to the Aristotelian natural philosophy of his day. This is sometimes known as the Apotelesmatika but more commonly known as the Tetrábiblos, from the Koine Greek meaning "Four Books", or by its Latin equivalent Quadripartitum.
Unlike most ancient Greek mathematicians, Ptolemy's writings never ceased to be copied or commented upon, both in Late Antiquity and in the Middle Ages.
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“Everything that is hard to attain is easily assailed by the generality of men.”

Ptolemy
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