9 August – Saint Secundianus, Saint Marcellianus, & Saint Varianus

14C Fresco in San Pietro in Tuscia
Martyre de saint Secondien et de ses compagnons (France, Paris. Bibliothèque de l’Arsenal, Ms-5080 réserve f.177v)
The Book of Saints

Modern Hagiography

Bibliotheca Sanctorum

Roman Martyrology

Lives of the Saints by Francis Weninger.

Medieval Hagiography

BHL, Supplement 

Acta Sanctorum, translation

The Cult of Saints in Late Antiquity Database

Art & Architecture

Portail Biblissima

9 August – Saints Firmus & Saint Rusticus

Maestro di Sant’Anastasia sec. XIV, San Pietro tra San Fermo e San Rustico
San Procolo con san Fermo e san Rustico by Sebastiano Ricci
Annus Dierum Sanctorum
Et nomen eorum vivit.
And their name liveth.
Corpora ipsorum in pace sepulta sunt.
Their bodies are buried in peace.
Ecclesiasticus 44.14
The Book of Saints

Modern Hagiography

Bibliotheca Sanctorum

Roman Martyrology

Medieval Hagiography

BHL, Supplement

Acta Sanctorum, translation

Art & Architecture

Index of Medieval Art

Catalogo generale dei beni culturali – Fermo & Rustico, Fermo, Rustico

BeWeB – Fermo & Rustico, Fermo, Rustico

Wikimedia Commons

Post-Biblical Saints Art Index
Saints and their Emblems

Caractéristiques des saints dans l’art populaire by Charles Cahier – ange.