The Carolingian Renaissance was the first of three medieval renaissances, a period of cultural activity in the Carolingian Empire. Charlemagne's reign led to an intellectual revival beginning in the 8th century and continuing throughout the 9th century, taking inspiration from ancient Roman and Greek culture and the Christian Roman Empire of the 4th century. The period saw an increase of literature, writing, visual arts, architecture, music, jurisprudence, liturgical reforms, and scriptural studies. Carolingian schools were effective centers of education, and they served generations of scholars by producing editions and copies of the classics, both Christian and pagan.