Piri Reis

Muhiddin Piri learned the sea under his uncle, the corsair Kemal Reis, sailing into Ottoman naval service and eventually commanding his own ship in wars against Venice. After his uncle's death, he turned to mapmaking, blending classical sources with his own voyages and fresh European intelligence in ways rare for Ottoman scholarship of the time. He fought in the 1517 conquest of Egypt, then presented his world map and later his Kitab-ı Bahriye - a nautical atlas - to the Sultans as gifts. Promoted to grand admiral of the Indian Ocean fleet, he won campaigns in the Red Sea but was executed following his retreat from the siege of Hormuz Island at the mouth of the Persian Gulf. His charts gathered dust until 1929, when renovators at Topkapı Palace unearthed the 1513 map; its citations of Portuguese explorers and a now-lost Columbus source made it a touchstone of national pride in Turkey, though fringe claims about an ice-free Antarctica - since disproven - have kept his name in wider circulation.