30 September – Saint Antoninus of Piacenza

Modern Hagiography

Bibliotheca Sanctorum

Martyrologium Romanum

Roman Martyrology

Medieval Hagiography

BHL, Supplementum

Acta Sanctorum

The Cult of Saints in Late Antiquity Database

Art & Architecture

Catalogo generale dei beni culturali

BeWeB, especially “Sant’Antonino, patrono di Piacenza: un martire e la sua basilica”

Medieval Religion Listserv

Basilica of Sant’Antonino in Piacenza

Polittico di Sant’Antonino (click on “Belongs to the Set” for detail of each panel)

Post-Biblical Saints Art Index (gives feast day incorrectly as 2 September, which is the feast day of Saint Antoninus of Apamea)

429 – Polittico above