22 April – Saint Epipodius & Saint Alexander

Modern Hagiography

Bibliotheca Sanctorum

Martyrologium Romanum – Saint Epipodius & Saint Alexander.

Roman Martyrology

Sanctorale Catholicum

Lives of the Saints by Alban Butler.

Victories of the Martyrs by Saint Alphonsus Liguori. 

La vie des saints 

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

Medieval Hagiography

BHL, Supplement

Acta Sanctorum

The Cult of Saints in Late Antiquity Database

A sermon by Eucherius on Epipodius and Alexander figures prominently in this scholarly article.

Art & Architecture

Index of Medieval Art

Saints and their Emblems

Caractéristiques des saints dans l’art populaire by Charles Cahier – Saint Alexander: crucifie & Saint Epipodius: soulier.

22 April – Saint Soter & Saint Caius

Modern Hagiography

Bibliotheca Sanctorum – Saint Soter & Saint Caius.

Martyrologium Romanum

Roman Martyrology

Sanctorale Catholicum

Lives of the Saints by Alban Butler – Soter & Caius.

The Liturgical Year by Dom Guéranger.

Character Calendar

Pictorial Lives of the Saints

La vie des saints

Medieval Hagiography

BHL – Soter, Caius

Acta Sanctorum – Soter, Caius

The Cult of Saints in Late Antiquity Database – Soter, Caius

Liber pontificalis – Soter, Caius

The Golden Legend (Pope Caius)

Breviarium Romanum – Latin & English

Writings by Saint Soter

Ad episcopos Italiae

Decretalia de fede

Writings by Saint Caius

Documenta Catholica Omnia

Art & Architecture

Index of Medieval Art – Soter, Caius
– El Escorial, Real Biblioteca, Cod. Vitrinas 17, folio 5r & 5v:

Catalogo generale dei beni culturali – San Caio, San Sotero

BeWeB – San Caio, San Sotero

Portail Biblissima – Saint Caius and also

Wikimedia Commons – Saint Soter & Saint Caius.

Martyrdom of Pope Caius

The Sistine Chapel, North Wall

Saint Soter
In situ
Die Sixtinische kapelle

Entrance Wall, Sistine Chapel

In situ
Post-Biblical Saints Art Index – Caius
Post-Biblical Saints Art Index – Soter
Saints and their Attributes
Saints and their Emblems
Saints and their Emblems

The Saints in Art by Joseph Maria von Radowitz – Caius.

22 April – Saint Leonides of Alexandria

Modern Hagiography

Bibliotheca Sanctorum

Martyrologium Romanum

Roman Martyrology

Sanctorale Catholicum

Lives of the Saints by Alban Butler.

Pictorial Lives of the Saints 

Medieval Hagiography

Acta Sanctorum

The Cult of Saints in Late Antiquity Database

Eusebius’s Ecclesiastical History

Art & Architecture

Portail Biblissima

Saints and their Emblems