The promise that Bavaria should be granted to Henry the Lion was not easily fulfilled, as Henry Jasomirgott refused to give up the duchy. At last, however, in 1156, after his return from his first expedition to Italy, Frederick reconciled the latter prince by making Austria into a duchy with certain special privileges, an important step in the process by which that country became the centre of a powerful state. Henry Jasomirgott then renounced Bavaria, and Henry the Lion became its duke. It was, however, in his other duchy of Saxony that the latter duke's most important work was done. Although he often gave offence by his haughty and aggressive disposition, few German princes have earned so thoroughly the goodwill of posterity. Since the death of Otto the Great the Slavonic lands to the east of the Elbe had been very imperfectly held in subjection by the Germans. Devoting himself to the conquest of the lands lying along the shore of the Baltic, Henry succeeded as no one before him had ever done. But he was not only a conqueror. He built towns and encouraged those which already existed; he founded and restored bishoprics in his new territories; and between the Elbe and the Oder he planted bodies of industrious colonists. While he was thus at work a similar task was being performed to the south-east of Saxony by Albert the Bear, the first margrave of Brandenburg, who, by his energetic rule was preparing this country for its great destinies. Frederick in Poland and Germany.