Admiral Piri Reis made an atlas in 1528 and included this map in that atlas by fixing the date as 1513. Afterwards it turned out that, mentioned historical material was copied from ancient manu-scripts kept in the library of Constantinople.According to historical sources, Piri Reis often visited that library in order to analyze ancient documents and maps. Mentioned map could attract attention of Turkish scientists for its exactness. It was almost the first map, which described outlines of America. Besides it, the sensational material included outlines of North America and Antarctica. It was made 21 years after the first travel of Columbus. But the Genoese admiral hadn¿t visited the continent besides eastern coasts of Panama, Nicaragua and Honduras. Antarctica was discovered after more than 300 years by Fadday Bellingshausen and Mikhail Lazarev (1820).The American secretary of state Henry Stimson also was interested in this investigation. He thought that, ¿Columbus¿s map¿ could be in Turkey. He ordered the ambassador of USA in Turkey to start researches in order to find mentioned map.