30 March – Saint Mamertinus & 20 April – Saint Marcian, both of Auxerre

Saint Marien d’Auxerre pasteur (France, Paris. Bibliothèque nationale de France, Département des manuscrits, NAF 23686 f.136)
Songe de saint Mamertin (France, Paris. Bibliothèque nationale de France, Département des manuscrits, NAF 23686 f.135v)
The Book of Saints

Modern Hagiography

Roman Martyrology – Saint Marcian

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

Saints and their Attributes

29 March – Saint Eustace of Luxeuil

Curing of blind persons by St. Eustasius of Luxeuil
Bavaria Sancta, Augsburg, Staats- und Stadtbibliothek — 2 Th L 65
Compositions artistiques (about)
The Book of Saints

Modern Hagiography

Roman Martyrology

Lives of the Saints by Alban Butler.

Lives of the Saints by Sabine Baring-Gould.

La vie des saints

Medieval Hagiography

BHL, Supplementum

Acta Sanctorum

The Cult of Saints in Late Antiquity Database

Art & Architecture

Index of Medieval Art