Ubi non est mulier ingemiscit egens.
Where there is no wife, he mourneth that is in want.
Ecclesiasticus 36.27
Qui pronus est ad miericordiam, benedicitur; de panibus enim suis dedit pauperi.
He that is inclined to mercy shall be blessed: for of his bread he hath given to the poor.
Proverbs 22.9
Modern Hagiography
Lives of the Saints by Alban Butler.
Lives of the Saints by Sabine Baring-Gould.
Our Birthday Bouquet Culled from the Shrines of the Saints and the Gardens of the Poets by Eleanor C. Donnelly.
Pictorial Half Hours with the Saints by Auguste François Lecanu.
Great Wives and Mothers by Hugh Francis Blunt.
Medieval Hagiography
Her lives are not in the public domain.
Nor is the Deeds of the Saxons, which also covers her life.
Art & Architecture
Warburg Institute Iconographic Database
Quedlinburg Abbey (see also)
Lives and Legends of the English Bishops and Kings, Mediaeval Monks, and Other Later Saints by Mrs. Arthur Bell.
The Saints in Art by Joseph Maria von Radowitz.
Nihil sub sole novum 