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Portolan Charts

1466 Roselli Portolan Chart

Comparing to Other Charts: The Danube

1466 Roselli Chart Danube

1466 Roselli

1489 Canepa Danube

1489 Canepa

The northern part of the 1466 and 1489 portolan charts look to be very similar at first glance.

The line of cities along the Danube seems to be the same in number and position.

Young Navigators Cartography

Young Navigators Geography

Under the magnifying glass: