20 July – Saint Ceslaus

Modern Hagiography

Bibliotheca Sanctorum

Lives of the Saints by Alban Butler.

Short Lives of the Dominican Saints 

Medieval Hagiography

Acta Sanctorum (16 July)

Art & Architecture

Europeana

Catalogo generale dei beni culturali

Tomb 

Saints and their Emblems
Saints and their Emblems

Caractéristiques des saints dans l’art populaire by Charles Cahier – armée, croissant, globes enflammés (artillerie).

20 July – Saint Vulmar

ORACULUM ANACHORETICUM

Modern Hagiography

Bibliotheca Sanctorum

Martyrologium Romanum

Roman Martyrology

Lives of the Saints by Alban Butler.

Lives of the Saints by Sabine Baring-Gould.

La vie des saints

Medieval Hagiography

BHL

Acta Sanctorum, translation

Art & Architecture

POP : la plateforme ouverte du patrimoine

Wikimedia Commons

Warburg Institute Iconographic Database

Église Saint Wulmar d’Eecke

Saints and their Attributes
Saints and their Emblems

Caractéristiques des saints dans l’art populaire by Charles Cahier – arbre, ermitage.

Music

Cantus: A Database for Latin Ecclesiastical Chant

19 July – Saint Vincent de Paul

Modern Hagiography

Bibliotheca Sanctorum

Martyrologium Romanum (27 September)

Roman Martyrology – 19 July & 27 September

Sanctorale Catholicum

Lives of the Saints by Alban Butler.

Lives of the Saints by Francis Weninger.

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.

Pictorial Half Hours with the Saints by Auguste François Lecanu.

Miniature Lives Of The Saints For Every Day In The Year by Henry Sebastian Bowden.

An Alphabet of Saints by Robert Hugh Benson, Reginald Balfour, and Charles Ritchie.

Little Lives of the Great Saints by John O’Kane Murray.

Stories of the Saints for Children [First Series] by Mary Seymour.

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

Patron Saints by Eliza Allen Starr.

Book of Saints and Heroes by Mrs. Lang.

Some Spiritual Guides of the Seventeenth Century by Abbé Huvelin.

Pillars of the Church

Great Catholics

Breviarium Romanum – Latin & English.

Writings of Saint Vincent de Paul

His writings in French take up many volumes, which you can easily find on archive.org. His works translated into English can be found here.

Some Counsels of S. Vincent de Paul 

Art & Architecture

Catalogo generale dei beni culturali

BeWeB

Europeana

POP : la plateforme ouverte du patrimoine

Vincentian Sources Image Archive

Vatican Founder Statue

17C portrait  

Saint-Vincent-de-Paul, Paris 

Guide to Christian Iconography: Images, Symbols, and Texts 

Post-Biblical Saints Art Index
Saints and their Attributes
Saints and their Emblems

Caractéristiques des saints dans l’art populaire by Charles Cahier – captifs, enfants, globe enflammé, Messe.

Sacred and Legendary Art volume II by Mrs. Jameson.

A Handbook of Christian Symbols and Stories of the Saints as Illustrated in Art by Clara Erskine Clement.

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

The Saints in Art with Their Attributes and Symbols, Alphabetically Arranged by Margaret E. Tabor.

Saints and their Symbols: A Companion in the Churches and Picture Galleries of Europe by E. A. Greene.

The Saints in Art by Joseph Maria von Radowitz.

Emblems of Saints by Which They Are Distinguished in Works of Art by F. C. Husenbeth.

Music

Hymn to Saint Vincent de Paul (just words, also here)

Parochial Hymn Book

Devotions

Prayer to Saint Vincent de Paul in the Raccolta 

Prayer to Saint Vincent de Paul 

Litany of Saint Vincent de Paul (also here)

Meditations for the Use of the Secular Clergy by Pierre Chaignon.