Ptolemy

Ptolemy

Claudius Ptolemy (; Koinē Greek: Κλαύδιος Πτολεμαῖος, Klaúdios Ptolemaîos [kláwdios ptolɛmɛ́os]; Latin: Claudius Ptolemaeus; c. 100 – c. 170) was a mathematician, astronomer, geographer and astrologer who wrote several 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 Mathematical Treatise (Μαθηματικὴ Σύνταξις) and then known as The Great Treatise (Ἡ Μεγάλη Σύνταξις). The second is the Geography, which is a thorough discussion of the geographic knowledge of the Greco-Roman world. Read more on Wikipedia

Since 2007, the English Wikipedia page of Ptolemy has received more than 3,420,963 page views. His biography is available in 107 different languages on Wikipedia making him the 5th most popular astronomer.