Conrad I., at the close of his reign, acknowledged that his policy had been a mistaken one by giving the crown to his most powerful antagonist, the Saxon leader, Duke Henry, whose power he had striven to abrogate. Henry I., called "the Fowler" and the "City Founder" (919-936), was the first German ruler who erected a true German kingdom. With quick discernment he founded the authority of the Crown on the union of the tribes, by reconciling their leaders and enforcing their submission through the ascendency of his own powerful Saxon tribe. Binding them by oath of fealty without detracting from their honour, he met with no opposition. His son, Otho I., the "Great," obtained the imperial crown in Rome, and increased the greatness of his new kingdom. Thus we find East Helvetia with Chur-Rhætia forming part of Alamannia, and presently the whole country was absorbed into, and its destinies bound up with, the vast empire. Burkhard I., assuming the title of "Duke of Alamannia by Divine Right," bent to Henry's royal supremacy with little objection, no doubt feeling it a safeguard to his own position. His successors likewise held to Germany, and were faithful adherents of the emperors, who in their turn strove to knit Swabia more closely with the empire. This alliance was highly valued by them; they had to pass through Chur-Rhætia on their expeditions to Italy; the Alamanni were famous for their prowess; and their religious institutions, St. Gall, Rheinau, and Reichenau, were famous centres of culture. Swabia became a highly valuable fief to be granted at the pleasure of the emperors. On the death of Burkhard, who fell in a skirmish whilst accompanying his son-in-law, Rudolf of Burgundy, to the south, as we have seen above, the duchy devolved on the son of Otho I., and then on Burkhard II. of Chur-Rhætia. He never swerved from his policy of holding to the empire, and his marriage with Otho's niece, whose beauty and courage and literary skill were celebrated in ballad and chronicle, drew the union still closer. On her husband's death, Hadwig inherited the title and his estates, but the duchy was granted to a friend of Otho II. She retired to her favourite residence, her manor on Mount Hohentwiel, near Lake Constance, where she lived in deep seclusion till her death in 994. A good Greek scholar and fond of learning, she invited young Ekkehard II. of St. Gall to her castle, and made him her chaplain and her tutor in classical studies. Hadwig is the central figure in Scheffel's brilliant novel "Ekkehard," which glows with life and sparkling humour, and is a fanciful rendering of the amusing narratives contained in the St. Gall annals. The chronicler and the poet combining have produced an immortal work, and shed a lasting glory on the cloisters of St. Gall.