Final answer:
Charlemagne revived the Carolingian art style, characterized by a cultural resurgence known as the Carolingian Renaissance, which was focused on classical revival in arts and architecture.
Step-by-step explanation:
The art style that Charlemagne revived was the Carolingian style. The Carolingian Renaissance was a period of intellectual, cultural, and artistic revival in Europe during the reign of Charlemagne, and it aimed at reviving the glory of the Roman Empire. At the heart of this renewal was the classical revival of architecture, handwriting, learning, and the arts. The Palatine Chapel at Aachen is a prime example of this revival and embodies the architectural aesthetics of Charlemagne's period. The Carolingian Renaissance drew influence from historical Roman figures like Constantine and sought to reestablish a Western Roman Empire.