Modern Hagiography
Lives of the Saints by Alban Butler.
Lives of the Saints by Sabine Baring-Gould.
The Liturgical Year by Dom Guéranger.
The Lives of Saints, with Other Feasts of the Year, According to the Roman Calendar by Peter Ribadeneira.
Medieval Hagiography
The Cult of Saints in Late Antiquity Database
Art & Architecture
Catalogo generale dei beni culturali
POP : la plateforme ouverte du patrimoine
A Guide to Christian Iconography: Images, Symbols, and Texts
The church of Santa Pudenziana in Rome, 11C Fresco of Saint Pudentiana above
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.
Nihil sub sole novum 