She was the second daughter of Judith of Swabia and Władysław I Herman. She was the granddaughter of Henry III, Holy Roman Emperor. Agnes became abbess at Gandersheim Abbey, place of several famous women, such as Hroswitha of Gandersheim, recorded by Conrad Celtes.
She died in Quedlinburg.
- McNamara, Jo Ann (1996). Sisters in arms: Catholic nuns through two millennia. Harvard University Press. p. 225. ISBN 0-674-80984-X. Retrieved 8 July 2009.
Adelheid II abbess.