used it. Moreover, Theophanu opposed Adelaide in the use of her dowry lands, which Adelaide wanted to continue to use and donate to ecclesiastical institutions to ensure her power base. Adelaide had the rights to make transactions of her Italian lands as she pleased, but she needed the permission of the emperor for her Ottonian lands. Adelaide also sided with her extended kin against her own son, the emperor. Wilson compares this action with those of other royal women: "Royal women possessed agency and did not always do the bidding of male relatives. Engelberge greatly influenced her husband, Emperor Louis II, in his attempts to extend imperial control to southern Italy in the 870s. Matilda’s favouritism for her younger son Heinrich caused Otto I considerable trouble, while Adelaide sided with her extended kin against her own son, Otto II, until he temporarily exiled her to Burgundy in 978. Agency was clearest during regencies, because these lacked formal rules, offering scope for forceful personalities to assert themselves." After being expelled from court by Otto II in 978, she divided her time living partly in Italy in the royal palace of Pavia and partly in Arles with her brother Conrad I, King of Burgundy, through whom she was finally reconciled with her son; in 983 (shortly before his death) Otto II appointed her his viceroy in Italy. Regency In 983, her son Otto II died and was succeeded by her grandson Otto III under the regency of his mother Adelaide's daughter-in-law Dowager Empress Theophanu while Adelaide remained in Italy. For some time, the two women were able to put aside their separate interests and work together to ensure Otto III's succession. They appeared together in the charters. When Theophanu died in 990, Adelaide assumed regency on behalf of her grandson the Emperor until he reached legal majority four years later. Adelaide's role in establishing Otto's position shows in a letter Otto III wrote to his grandmother in 996: "According to your [Adelheid’s] wishes and desires, the divinity has conferred the rights of an empire on us [Otto III] with a happy outcome". Troubles in the East continued under Adelaide, as Boleslaus of Bohemia wavered in his loyalty. In 992, there was war between Bohemia and Poland , and again like in Theophanu's time, the Ottonian regime sided with Poland. Jestice comments that, "Christianity was not re-established in the land of the Liutizi