Modern Hagiography
Lives of the Saints by Alban Butler.
Lives of the Saints by Sabine Baring-Gould.
The Liturgical Year by Dom Guéranger.
Stories of the Saints for Children Second Series by Mary Seymour.
Victories of the Martyrs by Saint Alphonsus Liguori.
Medieval Hagiography
The Golden Legend (and illustrations)
Art & Architecture
The Shrine to Saints Quiricus and Julitta in the Chapel of Theodotus in the church of Santa Maria Antiqua in Rome (background – video introducing the church – video of the chapel, in Italian – extensive photo gallery, and another extensive photo gallery)
15C Martyrdom of Saint Julitta
Warburg Institute Iconographic Database
Guide to Christian Iconography: Images, Symbols, and Texts
Medieval Religion Listserv – 2010 Dillon, 2012 Dillon.
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.