25 March – The Annunciation

by Simone Martini (its flanking panels, here)
Annus Dierum Sanctorum
Dies Domini
The day of the Lord
Isaiah 2.12
Respexit humilitatem Ancillae Suae.
he hath regarded the humility of his handmaid;
Luke 1.48

Modern Mariology

Roman Martyrology

Sanctorale Catholicum

Lives of the Saints by Alban Butler.

Lives of the Saints by Sabine Baring-Gould.

The Liturgical Year by Dom Guéranger.

Character Calendar

Pictorial Lives of the 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.

Sermons for Children’s Masses, According to the Sundays and Principal Festivals of the Year by Raphael Frassinetti.

Original, Short and Practical Sermons for Every Feast of the Ecclesiastical Year : Three Sermons for Every Feast by Francis Weninger.

Goffine’s Devout Instructions on the Epistles and Gospels for the Sundays and Holydays

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

Tradition in Action

“Annunciation Day” & “Annunciation Lilies” by Hugh Francis Blunt.

Biblical Text

Luke 1

Ancient and Medieval Mariology

Acta Sanctorum

A later tradition in Protoevangelium of James, but a source for details in many depictions of the Annunciation (scroll down to XI, incorrectly labeled as XL).

The Golden Legend (and illustrations)

Breviarium RomanumLatin & English.

Art & Architecture

Index of Medieval Art

Catalogo generale dei beni culturali

BeWeB

Portail Biblissima

POP : la plateforme ouverte du patrimoine

Warburg Institute Iconographic Database

A Guide to Christian Iconography: Images, Symbols, and Texts

Kornbluth Photography Historical Archive

Google Arts & Culture

Catacomb of Priscilla

Icon at the Monastery of Saint Catherine at Mount Sinai (scroll down, although its wonder cannot be captured with photography, slightly higher resolution here).  

Robert Campin

Leonardo da Vinci

Sandro Botticelli

Annunciation at the Musei Capitolini

The Real Van Eyck Revealed

“The Annunciation Zoom into Giovanni del Biondo’s hybrid devotional panel”

At the Metropolitan Museum of Art

Legends of the Madonna as Represented in the Fine Arts by Mrs. Jameson.

The Gospel in Art by Albert Bailey.

Sacred Symbols in Art by Elizabeth Edwards Goldsmith.

Music

Medieval Music Database

Cantus: A Database for Latin Ecclesiastical Chant, Eastertide

Hymn

Dixit Maria by Hans Leo Hassler (missa super & motet)

Songs for Catholic Schools

Devotions

Novena for the Annunciation in the Raccolta

Feastday Cookbook

Meditations for the Use of the Secular Clergy by Pierre Chaignon.

Manna for the Soul: Meditations for Every Day of the Year by Paulo Segneri.

Meditations on the Life, the Teaching and the Passion of Jesus Christ for Every Day of the Ecclesiastical Year with an Appendix of Meditations for the Festivals of Various Saints by Augustin Maria Ilg.

Meditations for All the Days of the Year by M. Hamon.

The Church Seasons Historically and Poetically Illustrated by Alexander H. Grant.

Heortology: A History Of The Christian Festivals From Their Origin To The Present Day by Heinrich Kellner.

The Way of Salvation: Meditations for Every Day of the Year by Saint Alphonsus Liguori.