18 December – Saint Gatianus of Tours

Saint Gatien (France, Tours. Bibliothèque municipale, Ms. 845 f. 108)
Couronnement de la Vierge avec saint Martin agenouillé devant le corps de saint Gatien
Saint Gatien guérissant un enfant malade
The Book of Saints

Modern Hagiography

Bibliotheca Sanctorum

Martyrologium Romanum

Roman Martyrology

Lives of the Saints by Alban Butler.

Lives of the Saints by Sabine Baring-Gould.

Character Calendar

Pictorial Lives of the Saints 

La vie des saints 

La vie des saints

In A Little Tour in France, Henry James on a visit to Marmoutier tells of cliffside sanctuaries to which Saint Martin and Saint Gatianus retreated for prayer. 

Contemporary Hagiography

BHL, Supplement

The Cult of Saints in Late Antiquity Database

Gatianus is named by Gregory of Tours in his History of the Franks (as Catianus).  

Art & Architecture

Index of Medieval Art

Portail Biblissima

POP : la plateforme ouverte du patrimoine

Cathédrale Saint-Gatien de Tours

Saints and their Attributes
Saints and their Emblems

Music

Cantus: A Database for Latin Ecclesiastical Chant