Portolan Chart System

Timeline

1. c. 1270–1400Mediterranean · MediterraneanItalian and Catalan sailors drew parchment coastal charts from compass bearings and estimated distances, with recognizable coastlines, ports and hazards densely marked in red and black ink, and rhumb-line networks radiating from compass roses to hold course at sea.
2. c. 1580–1590Naples · CampaniaBy the late 16th century portolan charts had extended to northern Europe and the Atlantic coast, employing a 32-point Catalan-style compass rose and lavish decoration; cartographers such as Oliva and Martinez produced large manuscript atlases in southern Italy covering the Mediterranean to northwestern Europe.
3. 1553–1585Venice · VenetoPortolan charts were used alongside coastal port lists and sailing-distance manuals (such as the Compasso de Navegare and portolani), forming a complete pilotage knowledge system from port to port; the chart provided the spatial framework while written manuals supplied course and distance data for each leg.
4. c. 1585–1600Mallorca · Balearic IslandsIn the late 16th century many portolan charts were made as luxurious atlases, hand-painted on parchment with gilded decoration, presented to royalty or wealthy merchants for display; though retaining a pilotage framework, fine execution and symbolic motifs show they also served status display, going beyond mere navigational utility.