Peter Martyr d'Anghiera (Latin: Petrus Martyr Anglerius or ab Angleria; Italian: Pietro Martire d'Anghiera; Spanish: Pedro Mártir de Anglería; 2 February 1457 – October 1526), formerly known in English as Peter Martyr of Angleria, was an Italian historian at the service of Spain during the Age of Exploration. He wrote the first accounts of explorations in Central and South America in a series of letters and reports, grouped in the original Latin publications of 1511 to 1530 into sets of ten chapters called "decades." His Decades are of great value in the history of geography and discovery. His De Orbe Novo (On the New World, 1530) describes the first contacts of Europeans and Native Americans, Native American civilizations in the Caribbean and North America, as well as Mesoamerica, and includes, for example, the first European reference to India rubber. It was first translated into English in 1555, and in a fuller version in 1912.
Martyr was born February 2, 1457 at Lake Maggiore in Arona in Piedmont and later named for the nearby city of Angera. He studied under Giovanni Borromeo, then the count of Arona. He went to Rome at the age of twenty, and met important men in the hierarchy of the Catholic Church. After meeting the Spanish ambassador in Rome, Martyr accompanied him to Zaragoza in August 1487. Martyr soon became a notable figure among the humanists of Spain. In 1488 he lectured in Salamanca on the invitation of the university. The new learning was supported by highly placed patrons in the society. Martyr would become chaplain to the court of Ferdinand and Isabella.