Quick Take
- A portolan-style world map compiled by Ottoman admiral Piri Reis in 1513. Only the western third survives and is kept at Topkapı Palace, Istanbul. Wikipedia
- Marginal notes say Piri drew on about twenty charts and mappae mundi, plus Portuguese maps and a Columbus map of the West Indies. archive.aramcoworld.com+1
- The map accurately outlines much of South America for its time and records early Atlantic knowledge. UNESCO
- Claims that it shows Antarctica ice-free are not supported by cartographic scholarship. ResearchGate