sentences:  From 1072 on he participated in the Saxon Rebellion led by Count Otto of Nordheim and Bishop Burchard II of Halberstadt, for which he was arrested after King Henry's victory in the 1075 Battle of Langensalza.Even after his release about two years later, he backed the German anti-king Rudolf of Rheinfelden until he was finally killed, possibly in a feud, at Westdorf near Aschersleben by the Saxon noble Egeno II of Konradsburg.Adalbert's widow Adelaide married Count Palatine Hermann II of Lotharingia from the Ezzonid dynasty and – in her third marriage – Count Palatine Henry of Laach from the House of Luxembourg, father of her son Siegfried.