Short answers, pulled from the story.
The Ottonian Renaissance was a revival of Byzantine and Late Antique art and learning in Central and Southern Europe that accompanied the reigns of Holy Roman Emperors Otto I (936-973), Otto II (973-983), and Otto III (983-1002). It extended into the early 11th century and is sometimes called the "Renaissance of the 10th century" or the "renewal of the year 1000."
The two leading figures were Abbo of Fleury, abbot of Saint-Benoît-sur-Loire, and Gerbert of Aurillac, scholaster of Reims and later Pope Sylvester II. Both were born around 940 and died within a year of each other, in 1003 and 1004 respectively.
Gerbert of Aurillac served as scholaster at Reims from 972, became archbishop of Ravenna in 998 by appointment of Emperor Otto III, and was then appointed pope in 999 by Otto III, taking the name Sylvester II. His elevation symbolized imperial control over the papacy. He died in 1003, a year after Otto III's death in 1002.
Renewed contact between the Ottonian court and Byzantine Constantinople drove a hybridization of Eastern-Byzantine and Western-Latin cultures in art, architecture, and metalwork. The marriage of Otto II to the Byzantine princess Theophanu in 972 brought Byzantine iconography directly into the Western court, including the globus cruciger as a symbol of imperial power.
The most celebrated scriptorium was the island monastery of Reichenau on Lake Constance, which produced the Codex Egberti, the Reichenau Evangeliary, the Liuther Codex, the Pericopes of Henry II, the Bamberg Apocalypse, and the Hitda Codex. Corvey, Hildesheim (after 1000), and Quedlinburg Abbey, founded by Otto I in 936, also produced significant illuminated manuscripts.
The Ottonian Renaissance was more limited in scope and largely a continuation of the Carolingian cultural legacy. Beyond the two main figures Abbo and Gerbert, the period produced fewer and less prolific scholars than the Carolingian period. Learning was centered in cathedral schools and bishops' courts rather than the royal court, and kings and princes were less engaged in patronage of culture than their Carolingian predecessors.