Johannes van Keulen (1654, Deventer - 1715, Amsterdam) was a 17th century Dutch cartographer. He published the influential nautical atlas the Zee-Atlas and the pilot guide Zee-Fakkel (meaning Sea-Torch in English).
In 1678/79 Johannes van Keulen established himself in Amsterdam and in 1680 he obtained a patent from the States of Holland and West Friesland allowing him to print and publish maritime atlases and shipping guides. These were books of maps and descriptions of itineraries, used by helmsmen for safe navigation. The patent was a kind of protection against illegal copying of produced books and charts. This was especially important for the atlases which were made with extensive initial costs. Van Keulen named his firm ‘In de Gekroonde Lootsman’ ('In the Crowned Pilot'). Soon Van Keulen struck a deal with cartographer Claes Jansz. Vooght.
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