A ruler of this dynasty legendarily discovered the Coronation Gospels in a tomb where a ghost cursed him to die without any heirs. The first ruler of this dynasty briefly married the then-nun Hatheburg of Merseburg, causing their son Thankmar (10[1])to be of questionable legitimacy, before remarrying the queen St. Matilda. The Liber Tertius recounting the rise of this dynasty was written by its contemporary Hrotvistha of Gandersheim. A ruler of this dynasty shared power with his canonized wife Adelaide of Italy. The East Francian (10[1])king Henry the Fowler fathered the namesake of this dynasty, who defeated the Magyars at the 955 Battle of Lechfeld and revived a title first given to Charlemagne. For 10 points, name this first German dynasty to rule the Holy Roman Empire. ■END■