 During the "interregnum" after the death of Emperor Frederick II, Elisabeth tried to secure the rights of her minor son Conradin, backed by her brothers, the Bavarian dukes Henry XIII and Louis II.In 1256 Elisabeth had to witness the execution of Louis' wife Maria of Brabant, whereafter she gave Conradin to the Bishop of Constance for care and education.Beset by intriguing Pope Alexander VI, she agreed to appoint Conradin's uncle Manfred, an illegitimate son of Frederick, regent in the Kingdom of Sicily on her son's behalf.