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

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

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.

Music

Cantus: A Database for Latin Ecclesiastical Chant