What was the extent of Charlemagne's empire?

Answer 1

Charlemagne's empire included nearly all of modern France, but not Brittany. It included northern Spain, in the area of the Pyrenees known as the Spanish March. It included Belgium and the Netherlands, most of what was West Germany, Switzerland, most of Austria, and parts of northern Italy, including Lombardy and Tuscany. In addition to this, areas extending for about three hundred kilometers east were very likely to be tributaries of the empire.

The Empire of the West, as Charlemagne's empire was called, gave rise to the nation of France and the Holy Roman Empire.