Claudius Ptolemy, Mathematician, Geographer, Astronomer and Astrologer Born in Ptolemais (Upper Egypt), hence his name, this illustrious astronomer and geographer lived in Alexandria. His masterful work, the Mathematical Composition (around the year 150), thirteen books, renamed Megiste Syntaxis (the very large treatise), and the Almagest by Arab astronomers and mathematicians (from al = le and … Continue reading Ptolemy (85 – 165), Mathematician, Geographer, Astronomer and Astrologer