19 May – Saint Peter Celestine

Couronnement du pape Célestin V
Annus Dierum Sanctorum
Pontifex anni illius.
The high priest of that year.
John 18.13
Appellatus a Deo Pontifex.
Called by God a high priest.
Hebrew 5.10

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 

La vie des saints

Miniature Lives Of The Saints For Every Day In The Year by Henry Sebastian Bowden.

Stories of the Saints Fifth Series by Mary Seymour.

Tradition in Action

Medieval Hagiography

BHL, Supplement

Acta Sanctorum

Breviarium RomanumLatin & English.

Art & Architecture

Index of Medieval Art

Vatican Colonnade

Catalogo generale dei beni culturali

BeWeB

Portail Biblissima

POP : la plateforme ouverte du patrimoine

17C Painting

Post-Biblical Saints Art Index
Saints and their Attributes

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

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.

Customs & Devotions

Late Medieval French Prayers

The Perdonanza Celestiniana (see also; YouTube Channel)