Modern Hagiography
Lives of the Saints by Alban Butler.
The Liturgical Year by by Dom Guéranger.
Miniature Lives of the Saints for Every Day in the Year
The lives of saints, with other feasts of the year, according to the Roman calendar by Peter Ribadeneira.
Contemporary and/or Medieval Hagiography
In the Dialogues of Gregory the Great (alternate edition).
9th Century Life and Miracles of Saint Maurus by Odo of Glanfeuil (free to borrow with registration).
Art
Saint Maurus by Gerard David
Warburg Institute Iconographic Institute
Post-Biblical Saints Art Index
Legends of the Monastic Orders as Represented in the Fine Arts 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 Great Hermits and Fathers of the Church, with Other Contemporary 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
Nihil sub sole novum 