Imperium CAROLIMAGNI Occidentis Imperatoris.

An attractive and detailed map of Charlemagne's empire, covering the British Isles, Denmark, the Low Countries, Germany, France, Spain, Switzerland, Austria, Italy, Hungary, Poland, the Balkans, Greece, etc. From his "Atlas Universel".
Gilles Robert de Vaugondy (1688–1766), also known as Le Sieur or Monsieur Robert, and his son, Didier Robert de Vaugondy (c.1723–1786), were leading mapmakers in France during the 18th century.

In 1757, they published The 'Atlas Universel', one of the most important atlases of the 18th century. To produce the atlas, the de Vaugondy's integrated older sources with more modern surveyed maps.
They verified and corrected the latitude and longitude of many regional maps in the atlas with astronomical observations. The older material was revised with the addition of many new place names. In 1760, Didier Robert de Vaugondy was appointed geographer to Louis XV.