11 May – Saint Mamertus of Vienne

Modern Hagiography

Bibliotheca Sanctorum

Martyrologium Romanum

Roman Martyrology

Sanctorale Catholicum

Lives of the Saints by Alban Butler.

Lives of the Saints by Sabine Baring-Gould.

Character Calendar 

Pictorial Lives of the 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.

La vie des saints

Medieval Hagiography

BHL, Supplement

Acta Sanctorum

The Cult of Saints in Late Antiquity Database

Letter from Sidonius Apollinaris about Bishop Mamertus instituting Rogation Days (scroll down to letter XIV)

Art & Architecture

Portail Biblissima

Wikimedia Commons

Saints and their Attributes
Saints and their Attributes
Saints and their Emblems

Music

Cantus: A Database for Latin Ecclesiastical Chant

Customs & Traditions

Ice Saints

11 May – Saint Majolus of Cluny

Modern Hagiography

Bibliotheca Sanctorum

Martyrologium Romanum

Roman Martyrology

Lives of the Saints by Alban Butler.

Lives of the Saints by Sabine Baring-Gould.

The Followers of the Lord: Stories for Children from Church History

Tradition in Action

Medieval Hagiography

BHL, Supplement

Acta Sanctorum

The Life of Saint Maiol, Abbot of Cluny, by his successor, Odilo

Writings by Saint Maiolus

Documenta Catholic Omnia

Scholarly Writing

Three chapters on Maiolus in The Early History of the Monastery of Cluny

Art & Architecture

Index of Medieval Art

Catalogo generale dei beni culturali
– Storie della vita di San Maiolo by Bernardino Lanzani in the Basilica of Santissimo Salvatore

BeWeB

Portail Biblissima

Medieval Religion Listserv – 2016 Dillon.

Saints and their Emblems

Caractéristiques des saints dans l’art populaire by Charles Cahier – argent, empereur.

11 May – Saint Gangulphus of Burgundy

Modern Hagiography

Bibliotheca Sanctorum

Martyrologium Romanum

Roman Martyrology

Lives of the Saints by Sabine Baring-Gould.

Website dedicated to Saint Gangulf

Medieval Hagiography

BHL, Supplement

Acta Sanctorum

Art & Architecture

Index of Medieval Art

Portail Biblissima

POP : la plateforme ouverte du patrimoine, especially the equestrian statues

Post-Biblical Saints Art Index
Saints and their Attributes
Saints and their Emblems

Caractéristiques des saints dans l’art populaire by Charles Cahier – source.

Lives and Legends of the English Bishops and Kings, Mediaeval Monks, and Other Later Saints by Mrs. Arthur Bell.

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

Cantus: A Database for Latin Ecclesiastical Chant