18 January – Saint Prisca

Chiesa di Santa Maria Egiziaca

Modern Hagiography

Bibliotheca Sanctorum

Martyrologium Romanum

Roman Martyrology

Sanctorale Catholicum

Dictionary of Saintly Women

Lives of the Saints by Sabine Baring-Gould.

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

The Book of Saints and Friendly Beasts by Abbie Farwell Brown. 

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.

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

The Cult of Saints in Late Antiquity Database

Breviarium Romanum – Latin & 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

Medieval Religion Listserv – 2015 Dillon1, 2015 Dillon2.

The Church of Santa Prisca in Rome

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

Sacred and Legendary Art volume II by Mrs. Jameson.

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

The Saints in Art with Their Attributes and Symbols, Alphabetically Arranged by Margaret E. Tabor.

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.

Music

Medieval Music Database

Cantus: A Database for Latin Ecclesiastical Chant

18 January – Cathedra Petri

Saint Peter Enthroned by Giovanni dal Ponte in the Uffizi
Annus Dierum Sanctorum
Super hanc petram aedificabo ecclesiam meam.
Upon this rock I will build my church.
Matthew 16.18
Non praevalebunt.
They shall not prevail
Matthew 16.18
Et agni in illa.
The Lamb shall be in it.
Apocalypse 22.3
Sub piscatoris
Under the fisherman
Sedes dei
Seat of God

Modern Hagiography

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.

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

Tradition in Action

The Feast of St. Peter’s Chair at Rome” by Thomas Aubrey de Vere.

Medieval Hagiography

Acta Sanctorum

Breviarium Romanum – Latin & English

Art & Architecture

Index of Medieval Art

Catalogo generale dei beni culturali

BeWeB

Warburg Institute Iconographic Database

Medieval Religion Listserv

The Cathedra Petri in the Basilica of San Pietro in Vaticano (more here and here).

Music

Hymns for Chair of Saint Peter

Devotions

Responsary of Saint Peter in the Raccolta

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