High Quality Content by WIKIPEDIA articles! The Fra Mauro map, considered the greatest memorial of medieval cartography according to Roberto Almagià is a map made around 1450 by the Venetian monk Fra Mauro. It is a circular planisphere drawn on parchment and set in a wooden frame, about two meters in diameter. A copy of the world map was made by Fra Mauro and his assistant Andrea Bianco, a sailor-cartographer, under a commission by king Afonso V of Portugal. This copy was completed on April 24, 1459, and sent to Portugal, but did not survive to the present day. The map was discovered in the monastery of San Michel in Isola, Murano, where the Camaldolese cartographer had his studio, and is now located in a stairway in the Biblioteca Nazionale Marciana in Venice, but is visible by entering in the Museo Correr, where it is accessible from the easternmost room upon request to the museum attendants there. A critical edition of the map was published by Piero Falchetta in 2006.