Modern Hagiography
Lives of the Saints by Alban Butler.
Lives of the Saints by Sabine Baring-Gould.
The Liturgical Year by Dom Guéranger.
Medieval Hagiography
Art & Architecture
15C Woodcut of The Martyrdom of Saint Erasmus
15C MS Illumination of The Martyrdom of Saint Erasmus
Saints Christopher, Eustace, and Erasmus by Tilman Riemenschneider.
Matthias Grünewald, Meeting of Saint Erasmus and Saint Maurice
Nicholas Poussin, The Martyrdom of Saint Erasmus and also
Warburg Institute Iconographic Database
Medieval-Religion Listserv – 2016 Dillon
Post-Biblical Saints Art Index
Sacred and Legendary Art volume II by Mrs. Jameson.
A Handbook of Christian Symbols and Stories of the Saints as Illustrated in Art by Clara Erskine Clement.
The Saints in Art with Their Attributes and Symbols, Alphabetically Arranged by Margaret E. Tabor.
Saints and their Symbols: A Companion in the Churches and Picture Galleries of Europe by E. A. Greene.
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.
Customs & Devotions
Nihil sub sole novum 
