Modern Hagiography
Lives of the Saints by Alban Butler.
Lives of the Saints by Sabine Baring-Gould.
The Liturgical Year by Dom Guéranger.
Our Birthday Bouquet Culled from the Shrines of the Saints and the Gardens of the Poets by Eleanor C. Donnelly.
Pictorial Half Hours with the Saints by Auguste François Lecanu.
Miniature Lives Of The Saints For Every Day In The Year by Henry Sebastian Bowden.
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
The Golden Legend (and illustrations)
Breviarium Romanum – Latin & English.
Writings of Pope Callixtus I
Art & Architecture
Warburg Institute Iconographic Database
Medieval Religion Listserv – 2016 Dillon.
Catacombe di San Callisto – Official Website, Roma sotterranea: Or Some Account of the Roman Catacombs, Especially of the Cemetery of San Callisto, The Catacombs of Saint Callistus: History and Description
Church of San Callisto in Rome
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
Nihil sub sole novum 