At a time when knowledge of the world was fragmented and based on travelers’ and merchants’ accounts, one man set out to ...

Claudius Ptolemy was a Greek mathematician ... Much of medieval astronomy and geography were built on his ideas: his world map, published as part of his treatise Geography in the 2nd century ...

Ptolemy’s other major treatise is the Geography, arguably the first major Western cartographical compilation. Alongside his Geography, Ptolemy’s maps and geographical descriptions were used by ...

“This was a very popular geography text for learning how the world is made up and how one navigates the world,” said Tad Boehmer, the library’s curator of rare books. Ptolemy Geographia ...