Nolite conformari huic seculo.
Be not conformed to this world,
Romans 12.2
Modern Hagiography
Lives of the Saints by Alban Butler.
Lives of the Saints by Sabine Baring-Gould.
Medieval Hagiography
Art & Architecture
Portail Biblissima
– Sainte Wautrude et sainte Gertrude (France, Paris. Bibliothèque nationale de France, Département des manuscrits, NAF 16251 f.104)
Warburg Institute Iconographic Database
Medieval Religion Listserv – 2016 Dillon.
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.
Emblems of Saints by Which They Are Distinguished in Works of Art by F. C. Husenbeth.
Music
Cantus: A Database for Latin Ecclesiastical Chant
Devotions
Ducasse du Mons (see also; not on the feast day of Saint Waltrude)
Nihil sub sole novum 