Abraham Ortelius; 1528-1598.

Ortelius name is often associated with Ptolemy and Mercator, when evocating the founding fathers of cartography.
Abaham Ortel (Ortelius), born in Antwerp, trained in classics and math. He became a book dealer and a map colorist. Widely traveling to attend fairs, he befriended many literati, in his homeland and abroad.
Upon their encouragement, he engaged in 1570 in the "Theatrum Orbis Terrarum" project, by collecting maps, charts and plans among diverse cartographers, and having Frans Hogenberg* re-engrave them in the same uniform size and style, to form the first known modern Atlas (even though this term was not used for another twenty years,.... by his major competitor: Gerard Mercator!).
The Theatrum knew an immediate and lasting success, being re-issued many times over in different languages. It always gave credit to the sources of informations and other contributors used to produce the maps (a practice few followed in those days).
Of note: the 42 editions of the "Theatrum" between 1570 and 1612, the 1577 "Spiegel der Werelt" (reduced version of the Theatrum engraved by Philippe Galle, issued till 1585); and the 1579 "Parergon Theatri" (historical atlas, reissued till 1624).

*Hogenberg associated with Georg Braun, was famous for their 1572 "Civitates Orbis Terrarum", a compilation of plans of the most significant towns of the time, being recycled many times till 1750 by Abraham Hogenberg, Frederick de Wit, Pieter van der Aa, Covens & Mortier.

Galliae regni potentiss: nova descriptio, Joanne Joliveto auctore.

This large decorative map (19 ¾"" X 13 11/16") is derived from the 1560 four part woodblock map of the Gauls by Jean Jolivet (see credit given in the title).
It was engraved for the 1570 edition of the Theatrum.
The present item was printed for the second French issue of said atlas in 1598.
While both coastlines and river courses are lacking, the location of towns, mountain ranges, forests (Perche, Sologne and above all Ardennes) and lakes, is remarkably accurate.
The map picture the kingdom of France with roman time frontiers (encompassing not only present days France, but also significant portions of Belgium, Holland, Luxemburg, Germany, Switzerland and Italy).
Notice that provinces, towns, rivers are given in vernacular and not in Latin as it was customary till the mid XVIIth century.
The top right cartouche alludes to the extremely advanced state of the arts and of the sciences in those parts, so much so that it was known for Romans to come to the Gauls for education, may be because of the Greek origin of Marseilles, as the author theorizes.
French text on verso.