Claudius Ptolemy (85–165 CE)
Claudius Ptolemy (Ancient Greek: Πτολεμαῖος, Ptolemaios; Latin: Claudius Ptolemaeus; c. 100 – 160s/170s AD)[1] was an Alexandrian mathematician, astronomer, astrologer, geographer, and music theorist[2] who wrote about a dozen scientific treatises, three of which were important...See more