Charles the Great or Charlemagne became the first emperor to rule from western Europe after the fall of the Roman Empire. Charlemagne at the time of building his palace, began the construction of the chapel in 792 AD, completed in 805 AD. The building is a centrally planned, domed chapel, decorated with a fresco, and later in mosaic. The architectural design of the Palatine Chapel is in the Carolingian-Romanesque and Gothic style.
