10 May – Saint Isidore the Farmer

Annus Dierum Sanctorum
quaerite primum regnum Dei, et haec omnia adjicientur vobis.
seek ye first the kingdom of God , and all these things shall be added unto you.
  Luke 12.31
Angelis suis mandavit de te.
He hath given his angels charge over thee.
Psalms 90.11
Pater meus agricola est.
My Father is the husbandman.
  John 15.1
Ite angeli veloces.
Go, ye swift angel.
Isaiah 18.2
Pater noster qui es in caelis.

Modern Hagiography

Roman Martyrology

Lives of the Saints by Alban Butler.

Lives of the Saints by Sabine Baring-Gould.

La vie des saints 

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

Light from the Lowly volume I by Francis Butina.

A Child’s Book of Saints by William Canton.

Legends of Saints and Birds by Agnes Aubrey Hilton.

Il libro d’oro

Tradition in Action

Medieval Hagiography

BHL

Life of San Isidro

Art & Architecture

Index of Medieval Art

Catalogo generale dei beni culturali

BeWeB, especially statuary

Warburg Institute Iconographic Database

A Guide to Christian Iconography: Images, Symbols, and Texts

Google Arts & Culture

Post-Bibical Saints Art Index
Saints and their Attributes

Sacred and Legendary Art volume I by Mrs. Jameson.

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

A Garner of Saints: Being a Collection of the Legends and Emblems Usually Represented in Art by Allen Hinds.

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.

The Saints in Art by Joseph Maria von Radowitz.

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