Atlantic Portolan Map Facsimile Edition

The Atlantic Portolan Map preserves a decisive moment in the history of navigation, when medieval chartmaking expanded beyond the Mediterranean into the wider oceanic world. Kept today in the Bayerische Staatsbibliothek as Cod.icon. 132, the map is attributed to the Portuguese cartographer Pedro Reinel and dated to around 1504.

An Atlantic World Coming into View

This manuscript belongs to the evolving tradition of the portolan chart, but it shifts that tradition toward a newly enlarged horizon. Rather than centering the enclosed sea routes of the Mediterranean, this chart places the Atlantic Ocean at the heart of its design.

Reinel positioned the centerpoint in the middle of the Atlantic and organized the composition around a large ornamental compass rose, making the ocean itself the chart’s governing space. Europe appears to the northeast, Africa to the east, and the northwestern edge suggests the emerging outline of Labrador and Nova Scotia.

Compass, Latitude, and Cartographic Innovation

The map’s significance lies not only in what it shows, but in how it thinks. Reinel’s chart includes latitude scales, one of the features that made it a major aid to navigation in the age of Atlantic exploration. The additional scale near Newfoundland and Labrador is a particularly notable Portuguese innovation, revealing a cartographic language already adapting to the demands of open-sea travel. Like other portolan charts, it is structured by directional lines and coastal precision, yet here those established conventions are reoriented toward discovery, distance, and uncertainty.

A Map Between Experience and Exploration

More than a technical object, the Atlantic Portolan Map embodies the transformation of geographic knowledge at the beginning of the sixteenth century. It is a navigational instrument, but also an image of a world being remeasured. In its parchment surface, disciplined inscriptions, and ocean-centered design, it captures the moment when maritime practice began to redraw the boundaries of the known world.