19 April – Saint Ælfheah of Canterbury

Saint Alphege

Modern Hagiography

Bibliotheca Sanctorum

Martyrologium Romanum

Roman Martyrology

Sanctorale Catholicum

A Menology of England and Wales

Lives of the Saints by Alban Butler.

Lives of the Saints by Sabine Baring-Gould.

Character Calendar

Pictorial Lives of the Saints 

Miniature Lives of the Saints for Every Day in the Year

Stories of the Saints for Children: The Black Letter Saints by Mrs. Molesworth.

Martyrs and Saints of the First Twelve Centuries: Studies from the Lives of the Black Letter Saints of the English Calendar by Elizabeth Rundle Charles.

Lives and Legends of English Saints by L.M. Shortt.

Medieval Hagiography

BHL, Supplement

Acta Sanctorum

In the Anglo-Saxon Chronicle – years 1006, 1007, 1011, 1023.

The Golden Legend

Art & Architecture

Index of Medieval Art

Passional of Canterbury

Warburg Institute Iconographic Database

Saints and their Attributes
Saints and their Emblems

Caractéristiques des saints dans l’art populaire by Charles Cahier –armée, démon, ermitage, hache, pains, pierres.

A Handbook of Christian Symbols and Stories of the Saints as Illustrated in Art by Clara Erskine Clement.

Lives and Legends of the English Bishops and Kings, Mediaeval Monks, and Other Later Saints by Mrs. Arthur Bell.

Saints and their Symbols: A Companion in the Churches and Picture Galleries of Europe by E. A. Greene.

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.

19 April – Saint Leo IX

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.

Tradition in Action

Medieval Hagiography

BHL, Supplement

Acta Sanctorum

Life of Pope Leo IX (free to borrow with registration)

Writings of Pope Leo IX

Documenta Catholica Omnia

Letter to the Byzantine Emperor, Constantine Monomachos

Art & Architecture

Portail Biblissima

Catalogo generale dei beni culturali

BeWeB

Europeana

Warburg Institute Iconographic Database

Medieval Religion Listserv – 2016 Dillon.

16C Woodcut

Post-Biblical Saints Art Index
Saints and their Emblems

Caractéristiques des saints dans l’art populaire by Charles Cahier – eglise, lit .

Music

Cantus: A Database for Latin Ecclesiastical Chant

19 April – Blessed James Duckett

Early Modern Hagiography

Bibliotheca Sanctorum

Martyrologium Romanum

A Menology of England and Wales

Memoirs of Missionary Priests And Other Catholics Of Both Sexes That Have Suffered Death In England On Religious Accounts From The Year 1577 To 1684 by Richard Challoner.

Acts of English Martyrs Hitherto Unpublished

Mementoes of the English Martyrs and Confessors for Every Day in the Year