The Ottonian Renaissance was a limited "renaissance" of Byzantine and Late Antique art in Central and Southern Europe that accompanied the reigns of the first three Holy Roman Emperors of the Ottonian (or Saxon) dynasty: Otto I (936–973), Otto II (973–983), and Otto III (983–1002), and which in large part depended upon their patronage.
The concept of a renaissance was first applied to the Ottonian period by the German historian Hans Naumann - more precisely, his work published in 1927 grouped the Carolingian and Ottonian periods together under the title Karolingische und ottonische Renaissance (The Carolingian and Ottonian Renaissance). This was only two years after Erna Patzelt's coining of the term 'Carolingian Renaissance' (Die Karolingische Renaissance: Beiträge zur Geschichte der Kultur des frühen Mittelalters, Vienna, 1924), and the same year as Charles H. Haskins published The Renaissance of the Twelfth Century (Cambridge Mass., 1927)
One of three medieval renaissances, the Ottonian Renaissance began after King Otto's marriage to Adelaide of Italy (951) united the Italian and German kingdoms, and thus brought the West closer to Byzantium. He furthered the cause of Christian (political) unity with his Imperial coronation in 962 by the Pope at St. Peter's Basilica in Rome.