Complex sentence: The Carolingian Renaissance was the first of three medieval renaissances, a period of cultural activity in the Carolingian Empire occurring from the late eighth century to the ninth century which took inspiration from the Christian Roman Empire of the fourth century.
Split into simpler sentences: The Carolingian Renaissance was the first of three medieval renaissances, a period of cultural activity in the Carolingian Empire. It occurred from the late eighth century to the ninth century which took inspiration from the Christian Roman Empire of the fourth century.