18 April – Saint Idesbald

Ongeschonden lichaam van de zalige Idesbald, Abdijmuseum Ten Duinen Koksijde
Opgebaarde onverteerde lichaam van de H. Idesbald, 1625

Modern Hagiography

Bibliotheca Sanctorum

Martyrologium Romanum

Medieval Hagiography

Acta Sanctorum

Art & Architecture

Wikipedia Commons

14C-dating of the skeleton remains and the content of the lead coffin attributed to the Blessed Idesbald (Abbey of the Dunes, Koksijde, Belgium)

Saints and their Attributes

18 April – Saint Eleutherius & Saint Anthia

Ciborium, Basilica of Euphrasius, Poreč
Cicchini T. ultimo quarto sec. XVI, Sant’Eleuterio ed Anzia
Maestranze reatine sec. XII, Lapide in memoria dei santi Eleuterio e Anzia
Compositions artistiques (about)
The Book of Saints

Modern Hagiography

Bibliotheca Sanctorum

Roman Martyrology

Bibliotheca Sanctorum

Lives of the Saints by Sabine Baring-Gould.

Medieval Hagiography

BHL, Supplementum

Acta Sanctorum

The Cult of Saints in Late Antiquity Database

Art & Architecture

Index of Medieval Art, Martyrdom

Wikimedia Commons

Menologion of Basil II (about)

On the Pala d’Oro (?)

Saints and their Emblems

Caractéristiques des saints dans l’art populaire by Charles Cahier – anges, bucher, fournaise.