18 August – Saint Florus & Saint Laurus

Modern Hagiography

Bibliotheca Sanctorum

Roman Martyrology

Light from the Lowly volume II by Francis Butina.

Medieval Hagiography

Acta Sanctorum, translation

Scholarship

The Dioscuri in the Christian Legends by J. Rendel Harris.

Art & Architecture

Index of Medieval Art

Europeana

Three Russian Icons 

Post-Biblical Saints Art Index
Post-Biblical Saints Art Index

Caractéristiques des saints dans l’art populaire by Charles Cahier – ciseau.

18 August – Saint Agapitus of Palestrina

Saint Agapit foulant aux pieds un hybride zoomorphe (France, Dijon. Bibliothèque municipale, Ms. 641 f. 021v)
Annus Dierum Sanctorum
Deus meus misit Angelius suum, et conclusit ora leonum, et non nocuerunt mihi.
My God hath sent his angel, and hath shut up the mouths of the lions, and they have not hurt me.
Daniel 6.22

Modern Hagiography

Bibliotheca Sanctorum

Martyrologium Romanum

Roman Martyrology

Lives of the Saints by Alban Butler.

Lives of the Saints by Francis Weninger.

Lives of the Saints by Sabine Baring-Gould.

The Liturgical Year by Dom Guéranger.

Character Calendar 

Pictorial Lives of the Saints 

The Lives of Saints, with Other Feasts of the Year, According to the Roman Calendar by Peter Ribadeneira.

La vie des saints

Medieval Hagiography

BHL, Supplement 

Acta Sanctorum, translation

Art & Architecture

Index of Medieval Art

Catalogo generale dei beni culturali

BeWeB

Portail Biblissima

POP : la plateforme ouverte du patrimoine

Warburg Institute Iconographic Database

Cattedrale di Sant’Agapito martire 

Painted cycle of martyrdom

16C Paintings of Martyrdom 

17C Sculpture 

Saints and their Attributes
Saints and their Emblems

Caractéristiques des saints dans l’art populaire by Charles Cahier – lion.

The Saints in At by Joseph Maria von Radowitz.

Emblems of Saints by Which They Are Distinguished in Works of Art by F. C. Husenbeth.

Music

Cantus: A Database for Latin Ecclesiastical Chant

17 August – Saint Mammes of Caesarea

Morte di San Mamante

Modern Hagiography

Bibliotheca Sanctorum

Martyrologium Romanum

Roman Martyrology

Sanctorale Catholicum

Lives of the Saints by Alban Butler.

Lives of the Saints by Sabine Baring-Gould.

La vie des saints 

La vie des saints

Our Birthday Bouquet Culled from the Shrines of the Saints and the Gardens of the Poets by Eleanor C. Donnelly.

Pictorial Half Hours with the Saints by Auguste François Lecanu.

Victories of the Martyrs by Saint Alphonsus Liguori.

Medieval Hagiography

BHL, Supplement 

Acta Sanctorum, translation

The Cult of Saints in Late Antiquity Database

Art & Architecture

Index of Medieval Art

Portail Biblissima

POP : la plateforme ouverte du patrimoine

Wikimedia Commons

Medieval Religion Listserv – 2016 Dillon.

Vatican Colonnade 

Menologion of Basil II (about)

Saints Mamas and James on The Pistoia Santa Trinità Altarpiece 

Post-Biblical Saints Art Index
Saints and their Attributes
Saints and their Emblems

Caractéristiques des saints dans l’art populaire by Charles Cahier – cerf, entrailles, trident.

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.

Devotions

“Veneration” in Wikipedia Entry