12 January – Saint Arcadius of Mauretania

Annus Dierum Sanctorum
Mortificate ergo membra vestra, quae sunt super terram.
Mortify therefore your members which are upon the earth.
Colossians 3.5
Bonum est tibi claudum introire in vitam aeternam.
It is better for thee to enter lame into life everlasting.
Mark 9.44
O felicia membra

Modern Hagiography

Roman Martyrology

Sanctorale Catholicum

Lives of the Saints by Alban Butler.

Lives of the Saints by Sabine Baring-Gould.

Victories of the Martyrs by Saint Alphonsus Liguori. 

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.

Miniatures Lives of the Saints for Every Day of the Year

Medieval Hagiography

BHL

Acta Sanctorum

The Cult of Saints in Late Antiquity Database

Art & Architecture

Warburg Institute Iconographic Database

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.