General Notes

Name Suffix:<NSFX> " Holy Roman Emperor
Otto I, byname OTTO THE GREAT, German OTTO DER GROSSE (b. Nov. 23, 912--d. May 7, 973, Memleben, Thuringia), duke of Saxony (as Otto II, 936-961), German king (from 936), and Holy Roman emperor (962-973), who consolidated the German Reich by his suppression of rebellious vassals and his decisive victory over the Hungarians. His use of the church as a stabilizing influence created a secure empire and stimulated a cultural renaissance.
Early years.
Otto was the son of the future king Henry I, of the Liudolfing, or Saxon, dynasty, and his second wife, Matilda. Little is known of his early years, but he probably shared in some of his father's campaigns. He married Edith, daughter of the English king Edward the Elder, in 930; she obtained as her dowry the flourishing town of Magdeburg. Nominated by Henry as his successor, Otto was elected king by the German dukes at Aachen on Aug. 7, 936, a month after Henry's death, and crowned by the archbishops of Mainz and Cologne.
While Henry I had controlled his vassal dukes only with difficulty, the new king firmly asserted his suzerainty over them. This led immediately to war, especially with Eberhard of Franconia and his namesake, Eberhard of Bavaria, who were joined by discontented Saxon nobles under the leadership of Otto's half-brother Thankmar. Thankmar was defeated and killed, the Franconian Eberhard submitted to the King, and Eberhard of Bavaria was deposed and outlawed. In 939, however, Otto's younger brother Henry revolted; he was joined by Eberhard of Franconia and by Giselbert of Lotharingia and supported by the French king Louis IV. Otto was again victorious: Eberhard fell in battle, Giselbert was drowned in flight, and Henry submitted to his brother. Nevertheless, in 941 Henry joined a conspiracy to murder the King. This was discovered in time, and, whereas the other conspirators were punished, Henry was again forgiven. Thenceforward he remained faithful to his brother and, in 947, was given the dukedom of Bavaria. The other German dukedoms were likewise bestowed on relatives of Otto.
Foreign conquests.
Despite these internal difficulties, Otto found time to strengthen and to extend the frontiers of the kingdom. In the east the margraves Gero and Hermann Billung were successful against the Slavs, and their gains were consolidated by the founding of the Monastery of St. Maurice in Magdeburg, in 937, and of two bishoprics, in 948. In the north, three bishoprics (followed in 968 by a fourth) were founded to extend the Christian mission in Denmark. Otto's first campaign in Bohemia was, however, a failure, and it was not until 950 that the Bohemian prince Boleslav I was forced to submit and to pay tribute.
Having thus strengthened his own position, Otto could not only resist France's claims to Lorraine (Lotharingia) but also act as mediator in France's internal troubles. Similarly, he extended his influence into Burgundy. Moreover, when the Burgundian princess Adelaide, the widowed queen of Italy whom the margrave Berengar of Ivrea had taken prisoner, appealed to him for help, Otto marched into Italy in 951, assumed the title of king of the Lombards, and married Adelaide himself, his first wife having died in 946. In 952 Berengar did homage to him as his vassal for the kingdom of Italy.
Otto had to break off his first Italian campaign because of a revolt in Germany, where Liudolf, his son by Edith, had risen against him with the aid of several magnates. Otto found himself compelled to withdraw to Saxony; but the position of the rebels began to deteriorate when the Magyars invaded Germany in 954, for the rebels could now be accused of complicity with the enemies of the Reich. After prolonged fighting, Liudolf had to submit in 955. This made it possible for Otto to defeat the Magyars decisively in the Battle of the Lechfeld, near Augsburg, in August 955; they never invaded Germany again. In the same year Otto and the margrave Gero also