Caveri map

Caveri map
Nicolay de Caveri · Public domain · source
Name	Caveri map
Caption	Early 15th-century portolan chart attributed to Zuane Pizzigano or Caveri workshop
Date	c. 1430s–1440s
Place	Genoa
Creator	Anonymous (attributed)
Type	Portolan chart
Material	Parchment

Caveri map The Caveri map is an early 15th-century portolan chart associated with the Genoese cartographic tradition and notable for its depiction of Atlantic islands and western African coasts. Its circulation influenced navigators, merchants, and mapmakers linked to Genoa, Venice, Lisbon, Seville, and Majorca, and it figures in scholarly debates alongside works by Zuane Pizzigano, Angelino Dulcert, Mauro Martines, and the Catalan Atlas. The chart has been discussed in relation to voyages sponsored by the House of Medici, the Crown of Aragon, and the Portuguese Casa da Índia bureaucracy, and it intersects with documents from the Archivio di Stato di Genova and the Arquivo Nacional Torre do Tombo.

Overview

The chart belongs to the corpus of medieval and early Renaissance portolan charts exemplified by examples in the collections of the British Library, the Biblioteca Nazionale Marciana, the Bibliothèque nationale de France, and the Vatican Library. Scholars compare it with the works of Pietro Vesconte, Bianco's 1436 map, Maso di Banco, Fra Mauro, and anonymous Genoese ateliers when considering stylistic parallels in rhumb-line networks, toponyms, and iconography. Its Atlantic detail has been cited in historiography concerning pre-Columbian knowledge, navigation narratives recorded by Johann Schöner, and later compilations by Gerardus Mercator and Abraham Ortelius.

Authorship and Date

Attribution of the chart has been contested, with proposed links to Genoese, Venetian, and Majorcan workshops including names such as Zuane Pizzigano, Giacomo Russo, and anonymous mapmakers associated with the Compagnia Marittima. Paleographic and pigment analysis has been compared to dated charts by Pietro Vesconte and signed works in the archives of Genoa Cathedral and the Scuola Grande di San Rocco, while dendrochronology and parchment studies engage methods used in assessments of works held by the Museo Correr and the Museo Galileo. Conservative estimates place the chart in the 1420s–1440s, aligning it chronologically with voyages documented in records from Henry the Navigator, the House of Aviz, and Prince Henry's patrons.

Cartographic Features and Content

The chart presents a network of rhumb lines, coastal toponyms, and island iconography comparable to portolans preserved at the Biblioteca Ambrosiana and the Biblioteca Palatina. It shows detailed coasts of Iberia, Brittany, and West Africa, and islands interpreted as Madeira, the Canary Islands, and speculative islands that historians have linked to reports of Bacalar, Antilia, and inscriptions reminiscent of narratives by Marco Polo, Ibn Battuta, and Pierre d'Ailly. Nautical markers and compass roses follow conventions akin to charts by Jacopo Russo and the Majorcan cartographic school, while toponymy recalls entries in merchant logs from Seville and pilot books associated with Lisbon mariners.

Sources and Influences

Analysts trace influences to Mediterranean charting practice, drawn from exemplar charts circulated among Genoa, Majorca, Naples, and Venice mariners, and to travel literature including accounts from Marco Polo, Brunetto Latini, and compilations preserved by Laurent d'Arvieux. The map's Atlantic elements may reflect oral and written seafaring intelligence recorded in the archives of the Order of Christ and commercial correspondence of the Bank of Saint George, and they engage with cartographic motifs visible in the Catalan Atlas and the anonymous Pinelli map tradition.

Historical Significance and Reception

The chart played a role in scholarly debates on the chronology of Atlantic discovery, featuring in discussions by historians of exploration such as Samuel Eliot Morison, Henri Michelant, R.H. Major, and modern researchers at institutions like the Royal Geographical Society and the Institute of Nautical Archaeology. It has been cited in controversies over pre-Columbian trans-Atlantic contacts examined by scholars referencing Columbus, Viking voyages to Vinland, John Cabot, and speculative connections to Irish monastic voyages. Reception among curators at the Victoria and Albert Museum, the Museo di Roma, and the University of Oxford has stimulated exhibitions and symposia linking it to maritime law records from the Consulate of the Sea.

Provenance and Physical Description

Provenance traces include possession records and sale catalogues involving collectors and institutions such as the Bibliothèque Mazarine, the Duke of Devonshire, the Walpole family, and private dealers documented in the archives of the Sotheby's and Christie's firms. The parchment sheet exhibits inkwork, tempera, and gilding techniques comparable to conservation findings at the British Museum and material analyses undertaken at the Courtauld Institute of Art. Marginal annotations parallel notations found in pilot books housed at the Institute of Navigation and merchant ledgers in the Archivio Storico di Genova.

Conservation and Reproductions

Conservation efforts have applied methods developed by specialists at the National Gallery, the Conservation Center of Italy, and the Getty Conservation Institute, using non-invasive imaging akin to projects at the Palazzo Vecchio and spectral analysis practices from the Smithsonian Institution. Facsimiles and digital reproductions have been produced for libraries including the Bodleian Library and the Library of Congress, and the chart features in catalogues published by the International Cartographic Association and exhibition catalogues prepared by the Museo Nazionale di Antichità.

Category:15th-century maps Category:Portolan charts