Piri Reis map  The Piri Reis map is a world map compiled in 1513 by the Ottoman admiral and cartographer Piri Reis (). Approximately one third of the map survives; it shows the western coasts of Europe and North Africa and the coast of Brazil with reasonable accuracy. Various Atlantic islands, including the Azores and Canary Islands, are depicted, as is the mythical island of Antillia and possibly Japan. The map's historical importance lies in its demonstration of the extent of global exploration of the New World by approximately 1510, and in its claim to have used a map of Christopher Columbus, otherwise lost, as a source. Piri also stated that he had used ten Arab sources and four Indian maps sourced from the Portuguese. More recently, the map has been the focus of claims for the pre-modern exploration of the Antarctic coast. The Piri Reis map is in the Library of the Topkapı Palace in Istanbul, Turkey, but is not usually on display to the public. The map is the extant western third of a world map drawn on gazelle skin parchment, with dimensions variously reported as 90 cm × 63 cm, 86 cm × 60 cm, 90 cm × 65 cm, 85 cm × 60 cm, 87 cm × 63 cm, and 86 cm × 62 cm. These discrepancies are largely due to the damaged corner. The surviving portion primarily details the western coast of Africa and the eastern coast of South America. The map was signed by Piri Reis, an Ottoman-Turkish admiral, geographer and cartographer, and dated to the month of Muharram in the Islamic year 919 AH, equivalent to 1513 AD. It was presented to Ottoman Sultan Selim I in 1517. In the map's legend, Piri inscribed that the map was based on about twenty charts and mappae mundi. According to Piri, these maps included eight Ptolemaic maps, an Arabic map of India, four newly drawn Portuguese maps from Sindh, and a map by Christopher Columbus of the western lands. From Inscription 6 on the map:  From eight Jaferyas of that kind and one Arabic map of Hind [India], and from four newly drawn Portuguese maps which show the countries of Sind [now in modern day Pakistan], Hind and Çin [China] geometrically drawn, and also from a map drawn by Qulūnbū [Columbus] in the western region, I have extracted it.