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Claudius Ptolemy
(Astronomer, Cartographer & Mathematician)
Birthdate: 0090 AD
Birthplace: Egypt
Died: 0168 AD
Claudius Ptolemy was a 2nd-century mathematician, astronomer, astrologer, and geographer, who had written a number of scientific treatises, such as The Great Treatise, Geography, and the Tetrábiblos. He lived in Alexandria under the Roman rule in Egypt. He had also authored Harmonics, a book on music theory.