Simplify the following text for a Grade 14 native English-speaking person.
Original: The Ottonian rulers are also regarded as the first dynasty of the Holy Roman Empire , as successors of the Carolingian dynasty and Charlemagne , who is commonly viewed as the original founder of a new ( Frankish ) Roman Empire .
Simplified: The Ottonian rulers are also regarded as the first dynasty of the Holy Roman Empire , as successors of the Frankish Carolingian dynasty and Charlemagne , who is commonly viewed as the founder of the Holy Roman Empire .