What modern nations were part of charlemagne's empire

France, Italy, Switzerland, Luxembburg, Lichtenstein, belgium, Netherlands, Germany, Austria, Slovenia, Croatia and parts of Spain were part of Charlemagne's empire

The Carolingian Empire is a historiographical term used to refer to the Frankish kingdom that dominated the Carolingian dynasty from the 8th century to the 9th century in Western Europe. This period of European history derives from the policy of the Frankish kings, Pippin the Brief and Charlemagne, which was an attempt to recover classical culture in the political, cultural and religious spheres of medieval times. The coronation of Charlemagne as emperor in Rome was an important and important fact as a symbol of the de facto restoration of the Western Roman Empire, which actually served to legitimize the power of the Germanic ethnic group that had invaded the territory that formerly belonged to the Romans. After its partition by the Treaty of Verdun in 843, it would be replaced a century later by the Kingdom of France in its western part, and by the Holy Germanic Roman Empire in the east.

the answer is b your welcome : )