A map of the Pontine marshes
The Royal Collection © 2012,
Her Majesty Queen Elizabeth II
RL 12684

A map of the Pontine marshes

c.1515

Leonardo da Vinci

Probably acquired by Charles II; Royal Collection by 1690

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This map covers a stretch of about forty miles (65 km) of the coast south of Rome, with north to the upper left. It concentrates on the Pontine marshes, a malarial plain caused by the coastal dunes that prevented the many small rivers flowing from the Monti Lepini and Ausoni from draining into the sea. More