10 January – Saint Agatho

Modern Hagiography

Roman Martyrology

Sanctorale Catholicum

Lives of the Saints by Alban Butler.

Lives of the Saints by Sabine Baring-Gould.

Contemporary Hagiography

BHL, Supplement

Acta Sanctorum

Liber pontificalis

Writings of Pope Agatho

Letters – to the Sixth Ecumenical Council, to the emperor, and to his legates.

Art

Warburg Institute Iconographic Database

Post-Biblical Saints Art Index

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