Modern Hagiograpy
Lives of the Saints by Alban Butler.
Lives of the Saints by Sabine Baring-Gould.
The Liturgical Year by Dom Guéranger.
Victories of the Martyrs by Saint Alphonsus Liguori.
An Alphabet of Saints by Robert Hugh Benson, Reginald Balfour, and Charles Ritchie.
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.
Short Instructive Sketches from the Lives of the Saints
Rainer Maria Rilke, “Saint Sebastian” (free to read with registration; also visible in the preview of this article).
Medieval Hagiography
An excerpt from a homily by Saint Ambrose of Milan on Psalm 118 (scroll down to find).
The Golden Legend (and illustrations)
Art & Architecture
The church of San Sebastiano fuori le mura in Rome
Three paintings by Andrea Mantegna, from over the course of his career from 1456 to 1490
A painting by Benozzo Gozzoli in the Collegiata in San Gimignano (1465)
A painting by Sandro Botticelli (1474)
A painting by Antonello da Messina (1476-1477)
A painting by Pietro Perugino (1490-1500)
The Averoldi Altarpiece by Titian in Santi Nazaro e Celsi in Brescia (1520-1522) (more here).
A painting by Paolo Veronese in the church of Saint Sebastian in Venice (1555-1570) (more here).
A painting by El Greco in Palencia Cathedral (1576-1579)
A painting by Tintoretto in the chapter room of the Scuola grande di San Rocco (1579-1581)
18C Libro del Compendio della Vita di tutti Santi
Exhibition: “Ravaged Body – Saint Sebastian”
Exhibition: “Patron Saint of Plague”
And to learn more about the popularity of images of Saint Sebastian, but in Northern Europe, and his association with plague, read this open access scholarly article from the Journal of Historians of Netherlandish Art.
Warburg Institute Iconographic Database
Guide to Christian Iconography: Images, Symbols, and Texts
Medieval Religion Listserv – 2016 Dillon, 2016 Plumb
Post-Biblical Saints Art Index
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.
A Garner of Saints: Being a Collection of the Legends and Emblems Usually Represented in Art by Allen Hinds.
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.
Sacred Symbols in Art by Elizabeth Edwards Goldsmith.
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
Le Martyre de saint Sébastien by Claude Debussy (more here).
Nihil sub sole novum 
