Claudius Ptolemy (150 AD) map drawn from Ptolemy's coordinates for a 1482 edition of his Geographia (The Ulm Edition, Leinhard Holle) Lands beyond the bounds of the known world tantalized the ...

Blame the Moon, and blame a man named Claudius Ptolemy. Around the year 150, the Roman Alexandrian scholar wrote a massive compendium of ancient math later (and famously) called the Almagest.

Claudius Ptolemy was a Greek mathematician, astronomer and geographer who lived in the Egyptian city of Alexandria while under the rule of the Roman Empire. Much of medieval astronomy and ...