4 May – Saint Antonia / 12 June – Saint Antonina

Modern Hagiography

Bibliotheca Sanctorum

Roman Martyrology – Antonia of Nicomedia on 4 May, Antonina of Nicaea on 12 June

Dictionary of Saintly Women – Antonia of Nicomedia, Antonina of Nicaea

Medieval Hagiography

BHL – Antonia of Nicomedia on 4 May

Acta Sanctorum – Antonia of Nicomedia on 4 May, Antonina of Nicaea on 1 March

The Cult of Saints in Late Antiquity Database – Antonia of Nicomedia

Art & Architecture