Cantino planisphere
In 1502, a Portuguese world map changed hands in Lisbon through an act of quiet theft. Alberto Cantino arrived as a horse trader for Ercole I d'Este, Duke of Ferrara, but his true mission was espionage. He paid twelve golden ducats to acquire the chart and smuggled it across the Mediterranean to Italy. An inscription on the back confirms the transaction: "Carta de navigar per le Isole nouam trovate in le parte de India: dono Alberto Cantino al S. Duca Hercole." This document became the earliest surviving map showing Portuguese geographic discoveries in both east and west. The map measures 220 by 105 centimeters and remains preserved today at the Biblioteca Estense in Modena.
The Cantino planisphere introduced a new method called the latitude chart during the second half of the fifteenth century. Unlike earlier portolan charts that relied on magnetic courses, this map placed locations according to their actual latitudes. Two circles formed the foundation of its rhumb line system. The western circle centered on the Cape Verde islands while the eastern circle focused on India. Sixteen equally spaced points marked each circumference, radiating thirty-two classic rhumbs from zero degrees to three hundred sixty degrees. A large wind rose connected these two outer circles in central Africa with a fleur-de-lis indicating north. Six scale bars graduated in Iberian leagues allowed sailors to measure distances between places along the coastlines.
Pedro Álvares Cabral explored the Brazilian coast in 1500 and his fleet's findings appeared on this manuscript. An inscription near Porto Seguro records how Cabral discovered land he thought was mainland while sailing toward Calicut. He described people walking naked as their mothers bore them, noting they were fair-skinned compared to reddish-brown tones. The map also shows the southern coast of Greenland studied by João Fernandes Lavrador in the late 1490s. African coastlines of both the Atlantic and Indian Oceans received remarkable detail and accuracy for the time. These geographic features represented strategic information valuable enough to make subsequent Portuguese mapping voyages obsolete within months.
Gaspar Corte-Real visited Newfoundland in 1500 and 1501 under King Manuel I of Portugal. His brother Miguel sailed west together to find a Northwest Passage to Asia. The Cantino map labels this territory Terra del Rey de Portuguall. A peculiar landmass appears roughly where North America should be, terminating in a peninsula labeled Cape of the end of April. This feature points toward the Caribbean Sea and has been linked to Asia, Yucatan, Florida, or Cuba by various scholars. John Cabot completed three voyages from Bristol under Henry VII of England before these discoveries reached European understanding. The map clarifies that Gaspar Corte-Real charted the land for King Manuel I of Portugal using data gathered between 1497 and 1501.
The geographical information on the Cantino map was copied into the Italian-made Canerio map shortly after its arrival in Italy. That Canerio document became the primary source for Martin Waldseemüller's highly influential wall map produced in 1507 under Rene, Duke of Lorraine. Johannes Schöner created globes that described similar lands as Terra ultra incognita or Land beyond unknown. Other maps depicting the same area include those calling it Parias or Asie partis based on Amerigo Vespucci's Four Voyages. These later cartographers relied heavily on the detailed coastal outlines first presented in the Portuguese manuscript. The influence spread rapidly through European libraries despite the original map being lost for centuries.
This old map made of six glued parchment sheets stayed in the Ducal Library at Ferrara for about ninety years. Pope Clement VIII transferred it to another palace in Modena, Italy during the early seventeenth century. More than two centuries passed until 1859 when the palace was ransacked and the Cantino Map disappeared from official records. Giuseppe Boni, Director of Biblioteca Estense, found the document in a butcher's store in Modena that same year. It now resides permanently at the Biblioteca Estense where scholars can study its unique historical information about maritime exploration. The rediscovery saved what remained of one of the earliest extant nautical charts depicting places in Africa and parts of Brazil according to their latitudes.
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Common questions
Who stole the Cantino planisphere in 1502 and for whom did he work?
Alberto Cantino stole the Portuguese world map in 1502 while working as a horse trader for Ercole I d'Este, Duke of Ferrara. He paid twelve golden ducats to acquire the chart and smuggled it across the Mediterranean to Italy.
What makes the latitude chart method on the Cantino planisphere unique compared to earlier maps?
The Cantino planisphere introduced a new method called the latitude chart during the second half of the fifteenth century that placed locations according to their actual latitudes instead of relying on magnetic courses. Two circles formed the foundation of its rhumb line system with sixteen equally spaced points marking each circumference.
Which specific explorers and territories appear on the Cantino planisphere from the early 1500s?
Pedro Álvares Cabral explored the Brazilian coast in 1500 and his fleet's findings appeared on this manuscript alongside Gaspar Corte-Real who visited Newfoundland in 1500 and 1501 under King Manuel I of Portugal. The map also shows the southern coast of Greenland studied by João Fernandes Lavrador in the late 1490s.
How did the Canerio map influence Martin Waldseemüller's wall map produced in 1507?
The geographical information on the Cantino map was copied into the Italian-made Canerio map shortly after its arrival in Italy which became the primary source for Martin Waldseemüller's highly influential wall map produced in 1507 under Rene, Duke of Lorraine. Other maps depicting the same area include those calling it Parias or Asie partis based on Amerigo Vespucci's Four Voyages.
When and where was the Cantino planisphere rediscovered after disappearing from official records?
More than two centuries passed until 1859 when the palace was ransacked and the Cantino Map disappeared from official records before Giuseppe Boni found the document in a butcher's store in Modena that same year. It now resides permanently at the Biblioteca Estense where scholars can study its unique historical information about maritime exploration.