8 October – Saint Demetrius of Thessaloniki

Dedication of a Child to Saint Demetrios in Hagios Demetrios, Thessaloniki
Possibly Saint Demetrios with an Angel in Hagios Demetrios in Thessaloniki
Annus Dierum Sanctorum
Signum Dei in frontibus
the sign of God on their foreheads
Apocalypse 9.4
Numquid non occidit gigantem?
Did not he kill the giant?
Ecclesiasticus 47.4
The Book of Saints

Modern Hagiography

Bibliotheca Sanctorum

Martyrologium Romanum (9 April, Saint Demetrius of Sirmium, but says popular in Thessaloniki)

Roman Martyrology

Lives of the Saints by Sabine Baring-Gould.

Medieval Hagiography

BHL, Supplement

Acta Sanctorum

The Cult of Saints in Late Antiquity Database

Passion and Miracles by Anastasius the Librarian

The Golden Legend

Art & Architecture

Index of Medieval Art

Portail Biblissima

Europeana

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

The Church of Hagios Demetrios in Thessaloniki

10C Byzantine Ivory

Menologion of Basil II (about)

12C with Saint George

13C Reliquary

Post-Biblical Saints Art Index

Saints and their Attributes
Saints and their Emblems

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

Cantus: A Database for Latin Ecclesiastical Chant

Oratorio by Nicolas Astrinidis

Customs & Devotions

Origin of the Cult

8 October – Saint Thaïs

Paphnuce libérant Thaïs by Philippe de
Champaigne
Saint Thaïs by Parmigianino
The Book of Saints

Modern Hagiography

Bibliotheca Sanctorum

Sanctorale Catholicum

Dictionary of Saintly Women

Lives of the Saints by Alban Butler.

Lives of the Saints by Sabine Baring-Gould.

The Lives of the Fathers of the Eastern Deserts by Richard Challoner.

Great Magdalens by Hugh Francis Blunt.

Medieval Hagiography

BHL, Supplement

Acta Sanctorum

The Cult of Saints in Late Antiquity Database

Life of Saint Thaïs

Paphnutius by Hrotsvitha

The Golden Legend (and illustrations)

Art & Architecture

Index of Medieval Art

Portail Biblissima

Warburg Institute Iconographic Database

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

Sacred and Legendary Art volume I by Mrs. Jameson.

Lives and Legends of the Great Hermits and Fathers of the Church, with Other Contemporary 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.

8 October – Saint Pelagia of Antioch (Penitent)

Sainte Pélagie et saint Nonnus (France, Paris. Bibliothèque nationale de France, Département des manuscrits, Français 51 f.32v)
Ste. Pélagie, pénitente (St. Pelagia, Penitent), October 8th, from Les Images De Tous Les Saincts et Saintes de L'Année (Images of All of the Saints and Religious Events of the Year), Jacques Callot (French, Nancy 1592–1635 Nancy), Etching; second state of two (Lieure)
Les Images De Tous Les Saincts et Saintes de L’Année
The Book of Saints

Modern Hagiography

Bibliotheca Sanctorum (Saint Pelagia of Jerusalem)

Martyrologium Romanum (identified as the Saint Pelagia of Antioch who was a Virgin and Martyr)

Roman Martyrology

Sanctorale Catholicum

Dictionary of Saintly Women

Lives of the Saints by Alban Butler.

Lives of the Saints by Francis Weninger.

Lives of the Saints by Sabine Baring-Gould.

La vie des saints

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

The Lives of the Fathers of the Eastern Deserts by Richard Challoner.

The Great Magdalenes by Hugh Francis Blunt.

Medieval Hagiography

BHL, Supplement

Acta Sanctorum

The Cult of Saints in Late Antiquity Database

The Life of Saint Pelagia the Harlot

Ambrose, De virginitate

The Golden Legend (and illustrations and other illustrations)

Art & Architecture

Index of Medieval Art

Portail Biblissima

Warburg Institute Iconographic Database

Vatican Colonnade

Menologion of Basil II (about)

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

Lives and Legends of the Great Hermits and Fathers of the Church, with Other Contemporary 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.