Engraved by Hendrik Floris van Langren. Second state (only two copies known of the first state). In the reverse text of the 1617-a edition, Kaerius acknowledges the adaptation of the lion from Von Aitzing: "typographicam Leonis Belgici primus in lucem edidit D. Michael Aitsingerius Austriacus" ("The Austrian Michael von Aitzing first published this representation of the Leo Belgicus"). The Netherlands, depicted in the form of a lion, originated with the Austrian Michael von Aitzing (c. 1530-98), who inserted in his book De Leone Belgico (1583) a Leo Belgicus map engraved by Frans Hogenberg. In the preface of this work, von Aitzing explains why he chose this particular title and inserted the lion map. He explains that Caesar mentioned in his "Commentaries" that the 'Belgae' were the strongest tribes, and he, therefore, decided - partly because of the religious conflicts in the war against Spain - to introduce the Netherlands in the shape of a lion.

Pieter Van den Keere (Petrus Kaerius) (1571-c.1650)

Pieter van den Keere was born in Ghent in 1571 as the son of the type-founder, Hendrik van den Keere. In 1584 he moved with his family for religious reasons to London. There, Van den Keere received training as an engraver from Jodocus Hondius, his brother-in-law. Not only the companionship with Jodocus Hondius but also the acquaintanceship with Pieter van den Berghe (Petrus Montanus) author of the text of the Germania Inferior originates from the years of refuge in London.
In 1593, both Keere and Hondius settled in Amsterdam. There, one of the first big enterprises was the large wall map of Europe, dated 1595: Nova totius Europae descriptio.
In 1610 he set up a workshop in the Kalverstraat that he called ‘In den onseeckeren tijd’ (In the uncertain time). In this period, he made numerous copperplates, including for maps for his atlas of the Netherlands and the Atlas Minor published by Jodocus Hondius.
The Germania Inferior (1617) is the first original atlas of the Netherlands published in folio size. The text for the atlas, both in Dutch and in French, was written by Petrus Montanus. After 1623, Claes Jansz. Visscher bought the plates and substituted his name for that of Kaerius’s. In 1634, Visscher included many of these maps in his Germana Inferior.
The fame of Kaerius is not only based on his atlas of the Netherlands. He is even better known as an engraver of many loose-leaf maps and as a collaborator of book publishers. His maps are found, i.a., in the Caert thresoor (Barent Langenes, 1598), Licht der Zeevaert (Blaeu, 1608), Atlas Minor (Hondius, 1628), and Caertboeck vande Midellandsche Zee (Barents, 1595).