Jan Janssonius

Johannes "Jan" Janssonius (1588, in Arnhem – buried 11 July 1664, Amsterdam), also known in English as Jan Jansson, was a Dutch cartographer and publisher, who lived and worked in Amsterdam in the 17th century. He is regarded as one of the notable figures in the Golden Age of Dutch cartography (c. 1570s–1670s), continuing the work of his famous father-in-law Jodocus Hondius.

Early life Janssonius was born in Arnhem in 1588, the son of Jan Janszoon the Elder, a publisher and bookseller.

In 1612, at the age of 24, he married Elisabeth de Hondt, the daughter of famous cartographers Jodocus Hondius and Colette van den Keere.

By about 1623, Janssonius had begun acquiring bookstores in several European cities, including Frankfurt am Main, Danzig, Stockholm, Copenhagen, Berlin, Königsberg, Geneva, and Lyon. These bookshops operated alongside his publishing activities and provided outlets for the distribution of his maps and atlases.

Additional volumes were issued as the series grew. These included works devoted to maritime geography, the ancient world, and collections of city views and plans. One of these was the Atlas Maritimus, a maritime atlas published in 1657. Janssonius also issued an extensive atlas of city plans, often referred to as a Townatlas.