Carte du Pais de Xaintonage.

Copper engraved map of Saintonge, France showing cities such as La Rochelle, Pons, Marans, etc. Two striking title cartouches with cities depicted in detail as miniature city plans.
Johannes Janssonius (1588 – 1664)or Jan Janszoon in English, was a Dutch cartographer who lived and worked in Amsterdam in the 17th century. In 1612 he married Elisabeth de Hondt, the daughter of Jodocus Hondius the very famous cartographer.
Janssonius produced his first maps in 1616 with the subject of France and Italy. In the 1630s he formed a partnership with his brother in law Henricus Hondius, and together they published atlases under the names Mercator/Hondius/Janssonius.
Under the leadership of Janssonius the Atlas was steadily enlarged and renamed “Atlas Novus”. In 1646 a fourth volume came out with "English County Maps", a year after a similar issue by Willem Blaeu.
Janssonius' maps were similar to Blaeu’s, and he is often accused of copying his rival, but in truth many of Janssonius’ maps predated those of Blaeu. By 1660, at which point the atlas bore the appropriate name "Atlas Major. Editions were printed in Dutch, Latin, French and German.
After Janssonius's death, the publishing company was continued by his son-in law, Johannes van Waesbergen.