Modern Hagiography
Lives of the Saints by Alban Butler.
Lives of the Saints by Francis Weninger.
Lives of the Saints by Sabine Baring-Gould.
The Lives of the Fathers of the Eastern Deserts by Richard Challoner.
Medieval Hagiography
The Golden Legend (and illustrations)
Art & Architecture
Warburg Institute Iconographic Database
Post-Biblical Saints Art Index
Lives and Legends of the Great Hermits and Fathers of the Church, with Other Contemporary Saints by Mrs. Arthur Bell.
The Saints in Art by Joseph Maria von Radowitz.