25 May – Saint Gregory VII

Vial VI, Euphrates dried up (Revelation 16:12) (about)
By Giuseppi Franchi Sala Federiciana, Bibliotheca Ambrosiana
Fresco in Sala Regia

Modern Hagiography

Roman Martyrology

Sanctorale Catholicum

Lives of the Saints by Alban Butler.

Lives of the Saints by Sabine Baring-Gould.

The Liturgical Year by Dom Guéranger.

Character Calendar 

Pictorial Lives of the Saints 

La vie des saints 

La vie des saints

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

Miniature Lives of the Saints for Every Day in the Year

Memorials of the Blessed: A Series of Short Lives of the Saints by Charles B. Fairbanks.

Saints and Heroes to the End of the Middle Ages by George Hodges.

Great Catholics

Tradition in Action

Medieval Hagiography

BHL

Acta Sanctorum

Breviarium RomanumLatin & English.

Writings of Pope Gregory VII

Letter to Hermann, Bishop of Metz

Epistolae vagantes

Four letters from the Epistolae vagantes

Selected Letters

Gregory VII calls for a crusade

Documents Relating to the War of Investiture

Art & Architecture

Index of Medieval Art

Catalogo generale dei beni culturali

BeWeB

Portail Biblissima

POP : la plateforme ouverte du patrimoine

Europeana

Wikimedia Commons

Tomb of Gregory VII in Salerno Cathedral

Post-Biblical Saints Art Index
Saints and their Attributes

Lives and Legends of the English Bishops and Kings, Mediaeval Monks, and Other Later Saints by Mrs. Arthur Bell.

Customs & Devotions

Prayer to Pope Gregory VII in the Raccolta