He subjugated Berengar of Ivrea to rescue the kidnapped (*) Adelaide, whom he married, making him King of Lombardy.
Historians such as Hans Naumann attributed a renaissance to this man and his successors. He married his heir to a niece of John I Tzimiskes called Theophano. Soon after this ruler's ascension, he fought wars against the Dukes of Bavaria and Franconia, both of whom were called Eberhard. He allied with Louis IV to beat Hugh the Great of Paris.He spared Conrad the Red, who later made a crucial cavalry counterattack against an attack on his baggage train. He subjugated Berengar of Ivrea to rescue the kidnapped (*) Adelaide, whom he married, making him King of Lombardy. This ruler inherited the Duchy of Saxony upon the death of his father, Henry the Fowler. He relieved a siege of Augsburg by beating a Magyar army at the Battle of Lechfeld. For 10 points, name this ruler crowned by Pope John XII in 962 as the first ruler of the Holy Roman Empire.
Historians such as Hans Naumann attributed a renaissance to this man and his successors.
 Otto the Great [or Otto I; or Otto der Grosse; or Otto II of Saxony; prompt on "Otto"]