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.
Writings of Pope Callixtus I
Art & Architecture
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
Medieval Religion Listserv – 2016 Dillon.
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.