Modern Hagiography
Bibliotheca Sanctorum – Saint Mamertinus, Saint Marianus
Martyrologium Romanum – Saint Marianus
Roman Martyrology – Saint Marianus
Wikipedia – Saint Mamertinus, Saint Marianus
Medieval Hagiography
BHL – Saint Mamertinus, Supplement ; Saint Marianus
Acta Sanctorum (combined with Saint Marianus)
The Golden Legend (and illustrations) (Saint Mamertinus)
Art & Architecture
Index of Medieval Art – Saint Mamertinus
Portail Biblissima – Mamertin & Marien d’Auxerre
POP : la plateforme ouverte du patrimoine – Mamertin, Marien
Warburg Institute Iconographic Database – Saint Mamertinus
Caractéristiques des saints dans l’art populaire by Charles Cahier – Saint Marien: pâtre.
Nihil sub sole novum 