26 April – Saint Cletus & Saint Marcellinus

Modern Hagiography

Roman Martyrology

Sanctorale CatholicumSaint Cletus.

Lives of the Saints by Alban Butler.

Lives of the Saints by Sabine Baring-Gould – Pope Cletus & Pope Marcellinus.

The Liturgical Year by Dom Guéranger.

Pictorial Lives of the Saints 

Our Birthday Bouquet Culled from the Shrines of the Saints and the Gardens of the Poets by Eleanor C. Donnelly – Pope Cletus.

Pictorial Half Hours with the Saints by Auguste François Lecanu – Pope Cletus.

Medieval Hagiography

Pope Cletus – BHL & Supplement

Pope Marcellinus – BHL & Supplement

Liber pontificalisPope Cletus & Pope Marcellinus

The Golden Legend Pope Marcellinus and Illustrations

Writings of Pope Cletus

Documenta Catholica Omnia

Writings of Pope Marcellinus

Documenta Catholica Omnia

Art & Architecture

Vatican Colonnade – Pope Marcellinus

Warburg Institute Iconographic Database – Pope Cletus & Pope Marcellinus

Post-Biblical Saints Art Index – Saint Cletus & Saint Marcellinus

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