6 April – Saint Sixtus I

Modern Hagiography

Roman Martyrology

Lives of the Saints by Alban Butler.

Lives of the Saints by Sabine Baring-Gould.

Medieval Hagiography

BHL

Liber pontificalis

Writings of Pope Sixtus I

Documenta Catholic Omnia

Art & Architecture

BeWeB

The Saints in Art by Joseph Maria von Radowitz.

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