Scarce historical French map of the Roman Empire, engraved by Pierre Filloeul apparently in concert with Nicolas Lenglet du Fresnoy, prior to the latter's death in 1755.
The map is rare itself (the BnF has an example for which their cataloging in reasonably sketchy), but this example is particularly interesting, as it was repurposed by an early (probably contemporary or nearly so) owner to show not the Roman Empire but that of Saracens, that is, the largest extent of the Muslim conquest after the death of the Prophet Mohammed.
An engraved notation in the upper-left corner suggests that the map was intended to be in Book I at page 484 no doubt of a historical work by Lenglet du Fresnoy. This example was either never included in such a work or was quickly removed for inclusion in a composite atlas.