14 September – Saint Maternus of Cologne

Modern Hagiography

Roman Martyrology

Lives of the Saints by Francis Weninger.

Lives of the Saints by Sabine Baring-Gould.

Medieval Hagiography

BHL, Supplement 

Art & Architecture

Egbert Psalter 

The Basilica of Saint Maternus in Walcourt, Belgium 

Warburg Institute Iconographic Database 

Medieval Religion Listserv – 2016 Dillon.

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.

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