Piri Reis
Ottoman admiral Piri Reis ( or "Hacı Ahmet Muhittin Pîrî Bey") was a navigator, geographer and cartographer active in the early 1500s. He is known today for his maps and charts collected in his "Kitab-ı Bahriye" ("Book of Navigation"), and for the Piri Reis map, one of the oldest maps of America still in existence.